diff --git a/data/gui.glade b/data/gui.glade
deleted file mode 100644
index 72dd9cc..0000000
--- a/data/gui.glade
+++ /dev/null
@@ -1,2091 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<interface>
-  <!-- interface-requires gtk+ 3.0 -->
-  <object class="GtkListStore" id="clouds_layers_model">
-    <columns>
-      <!-- column-name Height -->
-      <column type="gdouble"/>
-      <!-- column-name Scale -->
-      <column type="gdouble"/>
-    </columns>
-    <data>
-      <row>
-        <col id="0">0</col>
-        <col id="1">0</col>
-      </row>
-    </data>
-  </object>
-  <object class="GtkWindow" id="dialog_gradation">
-    <property name="can_focus">False</property>
-    <property name="title" translatable="yes">Paysages - Color gradient editor</property>
-    <property name="resizable">False</property>
-    <property name="modal">True</property>
-    <property name="window_position">center-on-parent</property>
-    <property name="destroy_with_parent">True</property>
-    <property name="skip_taskbar_hint">True</property>
-    <property name="transient_for">main_window</property>
-    <child>
-      <object class="GtkBox" id="box9">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="orientation">vertical</property>
-        <child>
-          <object class="GtkEventBox" id="eventbox7">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <property name="events">GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_STRUCTURE_MASK</property>
-            <property name="border_width">5</property>
-            <child>
-              <object class="GtkImage" id="gradation_editor_preview">
-                <property name="width_request">500</property>
-                <property name="height_request">50</property>
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="stock">gtk-missing-image</property>
-              </object>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkBox" id="box10">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <child>
-              <placeholder/>
-            </child>
-            <child>
-              <placeholder/>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">1</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkHButtonBox" id="hbuttonbox4">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <property name="homogeneous">True</property>
-            <property name="layout_style">spread</property>
-            <child>
-              <object class="GtkButton" id="gradition_editor_apply">
-                <property name="label" translatable="yes">Validate</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButton" id="gradation_editor_cancel">
-                <property name="label" translatable="yes">Cancel</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="position">1</property>
-              </packing>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">False</property>
-            <property name="padding">5</property>
-            <property name="position">2</property>
-          </packing>
-        </child>
-      </object>
-    </child>
-  </object>
-  <object class="GtkWindow" id="dialog_noise">
-    <property name="can_focus">False</property>
-    <property name="title" translatable="yes">Paysages - Noise editor</property>
-    <property name="resizable">False</property>
-    <property name="modal">True</property>
-    <property name="window_position">center-on-parent</property>
-    <property name="destroy_with_parent">True</property>
-    <property name="skip_taskbar_hint">True</property>
-    <property name="transient_for">main_window</property>
-    <child>
-      <object class="GtkVBox" id="vbox5">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <child>
-          <object class="GtkHBox" id="hbox4">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <child>
-              <object class="GtkButton" id="noise_editor_generate">
-                <property name="label" translatable="yes">Randomize base noise</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="padding">5</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkLabel" id="label9">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Entropy</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="padding">5</property>
-                <property name="position">1</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkSpinButton" id="noise_editor_base_size">
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="tooltip_text" translatable="yes">The entropy is the size of the random base.
-A small entropy will make the noise repeat more often.</property>
-                <property name="invisible_char">●</property>
-                <property name="primary_icon_activatable">False</property>
-                <property name="secondary_icon_activatable">False</property>
-                <property name="climb_rate">1</property>
-                <property name="numeric">True</property>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="padding">5</property>
-                <property name="position">2</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkLabel" id="label10">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Random seed</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="padding">5</property>
-                <property name="position">3</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkSpinButton" id="spinbutton4">
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="invisible_char">●</property>
-                <property name="invisible_char_set">True</property>
-                <property name="primary_icon_activatable">False</property>
-                <property name="secondary_icon_activatable">False</property>
-                <property name="numeric">True</property>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="padding">5</property>
-                <property name="position">4</property>
-              </packing>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">False</property>
-            <property name="padding">5</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkHBox" id="hbox3">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <child>
-              <object class="GtkFrame" id="frame1">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label_xalign">0</property>
-                <property name="shadow_type">etched-out</property>
-                <child>
-                  <object class="GtkVBox" id="vbox8">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="border_width">5</property>
-                    <child>
-                      <object class="GtkEventBox" id="eventbox3">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="events">GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_STRUCTURE_MASK</property>
-                        <child>
-                          <object class="GtkImage" id="noise_editor_preview">
-                            <property name="width_request">256</property>
-                            <property name="height_request">256</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="stock">gtk-missing-image</property>
-                          </object>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="padding">5</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkHButtonBox" id="hbuttonbox3">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="layout_style">spread</property>
-                        <child>
-                          <object class="GtkButton" id="noise_editor_preview_reset">
-                            <property name="label" translatable="yes">Center</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">True</property>
-                            <property name="use_action_appearance">False</property>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">False</property>
-                            <property name="position">0</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkButton" id="noise_editor_preview_mode">
-                            <property name="label" translatable="yes">1D</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">True</property>
-                            <property name="use_action_appearance">False</property>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">False</property>
-                            <property name="position">1</property>
-                          </packing>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="padding">5</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                  </object>
-                </child>
-                <child type="label">
-                  <object class="GtkLabel" id="label12">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="xpad">5</property>
-                    <property name="label" translatable="yes">Preview</property>
-                    <property name="use_markup">True</property>
-                  </object>
-                </child>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="padding">5</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkVBox" id="vbox6">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <child>
-                  <object class="GtkLabel" id="label11">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="label" translatable="yes">Noise levels</property>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkTreeView" id="noise_editor_levels">
-                    <property name="visible">True</property>
-                    <property name="can_focus">True</property>
-                    <property name="model">noise_editor_levels_model</property>
-                    <property name="headers_clickable">False</property>
-                    <property name="enable_search">False</property>
-                    <child internal-child="selection">
-                      <object class="GtkTreeSelection" id="treeview-selection1"/>
-                    </child>
-                    <child>
-                      <object class="GtkTreeViewColumn" id="treeviewcolumn1">
-                        <property name="title" translatable="yes">Height</property>
-                        <child>
-                          <object class="GtkCellRendererText" id="cellrendererspin1"/>
-                          <attributes>
-                            <attribute name="text">0</attribute>
-                          </attributes>
-                        </child>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkTreeViewColumn" id="treeviewcolumn2">
-                        <property name="title" translatable="yes">Scale</property>
-                        <child>
-                          <object class="GtkCellRendererText" id="cellrendererspin2"/>
-                          <attributes>
-                            <attribute name="text">1</attribute>
-                          </attributes>
-                        </child>
-                      </object>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">True</property>
-                    <property name="fill">True</property>
-                    <property name="padding">5</property>
-                    <property name="position">1</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkHButtonBox" id="hbuttonbox2">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="spacing">5</property>
-                    <property name="homogeneous">True</property>
-                    <property name="layout_style">spread</property>
-                    <child>
-                      <object class="GtkButton" id="button6">
-                        <property name="label" translatable="yes">Add level</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="use_action_appearance">False</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkButton" id="button7">
-                        <property name="label" translatable="yes">Remove level</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="use_action_appearance">False</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="padding">5</property>
-                    <property name="position">2</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkTable" id="table2">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="n_rows">2</property>
-                    <property name="n_columns">2</property>
-                    <child>
-                      <object class="GtkLabel" id="label7">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Height</property>
-                      </object>
-                      <packing>
-                        <property name="x_options"></property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkLabel" id="label8">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Scale</property>
-                      </object>
-                      <packing>
-                        <property name="top_attach">1</property>
-                        <property name="bottom_attach">2</property>
-                        <property name="x_options"></property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkSpinButton" id="noise_editor_height">
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="invisible_char">●</property>
-                        <property name="primary_icon_activatable">False</property>
-                        <property name="secondary_icon_activatable">False</property>
-                        <property name="digits">4</property>
-                        <property name="numeric">True</property>
-                      </object>
-                      <packing>
-                        <property name="left_attach">1</property>
-                        <property name="right_attach">2</property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkSpinButton" id="noise_editor_scale">
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="invisible_char">●</property>
-                        <property name="primary_icon_activatable">False</property>
-                        <property name="secondary_icon_activatable">False</property>
-                        <property name="climb_rate">1.0000000000000001e-05</property>
-                        <property name="digits">4</property>
-                        <property name="numeric">True</property>
-                      </object>
-                      <packing>
-                        <property name="left_attach">1</property>
-                        <property name="right_attach">2</property>
-                        <property name="top_attach">1</property>
-                        <property name="bottom_attach">2</property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="padding">5</property>
-                    <property name="position">3</property>
-                  </packing>
-                </child>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="padding">5</property>
-                <property name="position">1</property>
-              </packing>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">True</property>
-            <property name="fill">True</property>
-            <property name="padding">5</property>
-            <property name="position">1</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkHButtonBox" id="hbuttonbox1">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <property name="homogeneous">True</property>
-            <property name="layout_style">spread</property>
-            <child>
-              <object class="GtkButton" id="noise_editor_apply">
-                <property name="label" translatable="yes">Validate</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButton" id="noise_editor_cancel">
-                <property name="label" translatable="yes">Cancel</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="position">1</property>
-              </packing>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">False</property>
-            <property name="padding">5</property>
-            <property name="position">2</property>
-          </packing>
-        </child>
-      </object>
-    </child>
-  </object>
-  <object class="GtkWindow" id="dialog_render">
-    <property name="can_focus">False</property>
-    <property name="title" translatable="yes">Paysages - Render</property>
-    <property name="modal">True</property>
-    <property name="window_position">center-on-parent</property>
-    <property name="destroy_with_parent">True</property>
-    <property name="skip_taskbar_hint">True</property>
-    <property name="deletable">False</property>
-    <property name="transient_for">main_window</property>
-    <child>
-      <object class="GtkVBox" id="vbox9">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <child>
-          <object class="GtkScrolledWindow" id="scrolledwindow1">
-            <property name="width_request">850</property>
-            <property name="height_request">650</property>
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <child>
-              <object class="GtkViewport" id="viewport1">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <child>
-                  <object class="GtkImage" id="render_preview">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="stock">gtk-missing-image</property>
-                  </object>
-                </child>
-              </object>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">True</property>
-            <property name="fill">True</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkHBox" id="hbox5">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <child>
-              <object class="GtkProgressBar" id="render_progress">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButton" id="render_stop">
-                <property name="label" translatable="yes">Stop rendering</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="padding">5</property>
-                <property name="position">1</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButton" id="render_close">
-                <property name="label" translatable="yes">Close</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">2</property>
-              </packing>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">False</property>
-            <property name="padding">5</property>
-            <property name="position">1</property>
-          </packing>
-        </child>
-      </object>
-    </child>
-  </object>
-  <object class="GtkWindow" id="main_window">
-    <property name="can_focus">False</property>
-    <property name="title" translatable="yes">Paysages</property>
-    <child>
-      <object class="GtkVBox" id="vbox1">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <child>
-          <object class="GtkMenuBar" id="menubar1">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <child>
-              <object class="GtkMenuItem" id="menuitem1">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="use_action_appearance">False</property>
-                <property name="label" translatable="yes">_Fichier</property>
-                <property name="use_underline">True</property>
-                <child type="submenu">
-                  <object class="GtkMenu" id="menu1">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <child>
-                      <object class="GtkImageMenuItem" id="menu_new">
-                        <property name="label">gtk-new</property>
-                        <property name="visible">True</property>
-                        <property name="sensitive">False</property>
-                        <property name="can_focus">False</property>
-                        <property name="use_action_appearance">False</property>
-                        <property name="use_underline">True</property>
-                        <property name="use_stock">True</property>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImageMenuItem" id="menu_load">
-                        <property name="label">gtk-open</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="use_action_appearance">False</property>
-                        <property name="use_underline">True</property>
-                        <property name="use_stock">True</property>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImageMenuItem" id="menu_save">
-                        <property name="label">gtk-save</property>
-                        <property name="visible">True</property>
-                        <property name="sensitive">False</property>
-                        <property name="can_focus">False</property>
-                        <property name="use_action_appearance">False</property>
-                        <property name="use_underline">True</property>
-                        <property name="use_stock">True</property>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImageMenuItem" id="menu_saveas">
-                        <property name="label">gtk-save-as</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="use_action_appearance">False</property>
-                        <property name="use_underline">True</property>
-                        <property name="use_stock">True</property>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkSeparatorMenuItem" id="separatormenuitem1">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="use_action_appearance">False</property>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImageMenuItem" id="menu_quit">
-                        <property name="label">gtk-quit</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="use_action_appearance">False</property>
-                        <property name="use_underline">True</property>
-                        <property name="use_stock">True</property>
-                      </object>
-                    </child>
-                  </object>
-                </child>
-              </object>
-            </child>
-            <child>
-              <object class="GtkMenuItem" id="menuitem4">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="use_action_appearance">False</property>
-                <property name="label" translatable="yes">Aid_e</property>
-                <property name="use_underline">True</property>
-                <child type="submenu">
-                  <object class="GtkMenu" id="menu3">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <child>
-                      <object class="GtkImageMenuItem" id="menu_about">
-                        <property name="label">gtk-about</property>
-                        <property name="visible">True</property>
-                        <property name="sensitive">False</property>
-                        <property name="can_focus">False</property>
-                        <property name="use_action_appearance">False</property>
-                        <property name="use_underline">True</property>
-                        <property name="use_stock">True</property>
-                      </object>
-                    </child>
-                  </object>
-                </child>
-              </object>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkNotebook" id="tabs">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <child>
-              <object class="GtkHBox" id="hbox2">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <child>
-                  <object class="GtkVBox" id="vbox12">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="border_width">5</property>
-                    <property name="spacing">5</property>
-                    <child>
-                      <object class="GtkLabel" id="label19">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Height preview</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkEventBox" id="eventbox2">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="events">GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_STRUCTURE_MASK</property>
-                        <child>
-                          <object class="GtkImage" id="terrain_preview">
-                            <property name="width_request">256</property>
-                            <property name="height_request">256</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="stock">gtk-missing-image</property>
-                          </object>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkVBox" id="vbox7">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="border_width">5</property>
-                    <child>
-                      <object class="GtkButton" id="terrain_noise_edit">
-                        <property name="label" translatable="yes">Edit noise</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="border_width">5</property>
-                        <property name="use_action_appearance">False</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <placeholder/>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">True</property>
-                    <property name="fill">True</property>
-                    <property name="position">1</property>
-                  </packing>
-                </child>
-              </object>
-              <packing>
-                <property name="tab_fill">False</property>
-              </packing>
-            </child>
-            <child type="tab">
-              <object class="GtkLabel" id="label5">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Terrain</property>
-              </object>
-              <packing>
-                <property name="tab_fill">False</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkHBox" id="hbox7">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <child>
-                  <object class="GtkBox" id="box2">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="border_width">5</property>
-                    <property name="orientation">vertical</property>
-                    <property name="spacing">5</property>
-                    <child>
-                      <object class="GtkLabel" id="label17">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Coverage preview</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkEventBox" id="eventbox4">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="events">GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_STRUCTURE_MASK</property>
-                        <child>
-                          <object class="GtkImage" id="water_preview_coverage">
-                            <property name="width_request">256</property>
-                            <property name="height_request">256</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="stock">gtk-missing-image</property>
-                          </object>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkLabel" id="label18">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Look preview</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">2</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkEventBox" id="eventbox5">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="events">GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_STRUCTURE_MASK</property>
-                        <child>
-                          <object class="GtkImage" id="water_preview_render">
-                            <property name="width_request">256</property>
-                            <property name="height_request">256</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="stock">gtk-missing-image</property>
-                          </object>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">3</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkVBox" id="vbox13">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="border_width">5</property>
-                    <child>
-                      <object class="GtkButton" id="water_noise_edit">
-                        <property name="label" translatable="yes">Edit noise (waves)</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="border_width">5</property>
-                        <property name="use_action_appearance">False</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkGrid" id="grid1">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="border_width">5</property>
-                        <property name="row_spacing">5</property>
-                        <property name="column_spacing">5</property>
-                        <property name="n_rows">6</property>
-                        <property name="n_columns">2</property>
-                        <child>
-                          <object class="GtkLabel" id="label20">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Height</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">0</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label21">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Transparency</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">1</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label22">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Reflection</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">2</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkScale" id="water_transparency">
-                            <property name="width_request">250</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="round_digits">1</property>
-                            <property name="digits">2</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">1</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkScale" id="water_height">
-                            <property name="width_request">250</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="round_digits">2</property>
-                            <property name="digits">2</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">0</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label23">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Surface color</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">3</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkColorButton" id="water_color">
-                            <property name="width_request">100</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">True</property>
-                            <property name="halign">start</property>
-                            <property name="use_action_appearance">False</property>
-                            <property name="title" translatable="yes">Choose a main water color</property>
-                            <property name="rgba">rgb(0,0,0)</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">3</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkScale" id="water_reflection">
-                            <property name="width_request">250</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="round_digits">2</property>
-                            <property name="digits">2</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">2</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label28">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Depth color</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">4</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label32">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Depth limit</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">5</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkColorButton" id="water_color_depth">
-                            <property name="width_request">100</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">True</property>
-                            <property name="halign">start</property>
-                            <property name="use_action_appearance">False</property>
-                            <property name="title" translatable="yes">Choose a main water color</property>
-                            <property name="rgba">rgb(0,0,0)</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">4</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkScale" id="water_transparency_depth">
-                            <property name="width_request">250</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="round_digits">2</property>
-                            <property name="digits">2</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">5</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkButtonBox" id="buttonbox2">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="border_width">5</property>
-                        <property name="layout_style">spread</property>
-                        <child>
-                          <object class="GtkButton" id="water_apply">
-                            <property name="label" translatable="yes">Apply</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">True</property>
-                            <property name="use_action_appearance">False</property>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">True</property>
-                            <property name="position">0</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkButton" id="water_revert">
-                            <property name="label" translatable="yes">Cancel</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">True</property>
-                            <property name="use_action_appearance">False</property>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">True</property>
-                            <property name="position">1</property>
-                          </packing>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">2</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="position">1</property>
-                  </packing>
-                </child>
-              </object>
-              <packing>
-                <property name="position">1</property>
-              </packing>
-            </child>
-            <child type="tab">
-              <object class="GtkLabel" id="label13">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Water</property>
-              </object>
-              <packing>
-                <property name="position">1</property>
-                <property name="tab_fill">False</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkBox" id="box6">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <child>
-                  <object class="GtkBox" id="box7">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="border_width">5</property>
-                    <property name="orientation">vertical</property>
-                    <property name="spacing">5</property>
-                    <child>
-                      <object class="GtkLabel" id="label24">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Horizon preview</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">True</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkEventBox" id="eventbox6">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="events">GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_STRUCTURE_MASK</property>
-                        <child>
-                          <object class="GtkImage" id="sky_preview_horizon">
-                            <property name="width_request">256</property>
-                            <property name="height_request">256</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="stock">gtk-missing-image</property>
-                          </object>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">True</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkBox" id="box8">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="orientation">vertical</property>
-                    <child>
-                      <object class="GtkGrid" id="grid3">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="border_width">5</property>
-                        <property name="row_spacing">5</property>
-                        <property name="column_spacing">5</property>
-                        <property name="row_homogeneous">True</property>
-                        <property name="n_rows">7</property>
-                        <property name="n_columns">2</property>
-                        <child>
-                          <object class="GtkLabel" id="label27">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Day time</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">0</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkScale" id="sky_daytime">
-                            <property name="width_request">250</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="round_digits">2</property>
-                            <property name="digits">2</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">0</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label29">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Sun color</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">1</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label30">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Sun radius</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">2</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkScale" id="sky_sun_size">
-                            <property name="width_request">250</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="round_digits">2</property>
-                            <property name="digits">2</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">2</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label31">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Zenith color</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">3</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label33">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Haze color</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">4</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label34">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Haze height</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">5</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkScale" id="sky_haze_height">
-                            <property name="width_request">250</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="round_digits">2</property>
-                            <property name="digits">2</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">5</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkLabel" id="label26">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="label" translatable="yes">Haze smoothing</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">0</property>
-                            <property name="top_attach">6</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkScale" id="sky_haze_smoothing">
-                            <property name="width_request">250</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="round_digits">2</property>
-                            <property name="digits">2</property>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">6</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkHBox" id="hbox1">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <child>
-                              <object class="GtkImage" id="sky_colorgradient_sun">
-                                <property name="width_request">200</property>
-                                <property name="height_request">30</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">False</property>
-                                <property name="stock">gtk-missing-image</property>
-                              </object>
-                              <packing>
-                                <property name="expand">True</property>
-                                <property name="fill">True</property>
-                                <property name="position">0</property>
-                              </packing>
-                            </child>
-                            <child>
-                              <object class="GtkButton" id="sky_colorgradient_sun_edit">
-                                <property name="label" translatable="yes">Edit</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">True</property>
-                                <property name="receives_default">True</property>
-                                <property name="use_action_appearance">False</property>
-                              </object>
-                              <packing>
-                                <property name="expand">True</property>
-                                <property name="fill">True</property>
-                                <property name="position">1</property>
-                              </packing>
-                            </child>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">1</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkHBox" id="hbox6">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <child>
-                              <object class="GtkImage" id="sky_colorgradient_zenith">
-                                <property name="width_request">200</property>
-                                <property name="height_request">30</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">False</property>
-                                <property name="stock">gtk-missing-image</property>
-                              </object>
-                              <packing>
-                                <property name="expand">True</property>
-                                <property name="fill">True</property>
-                                <property name="position">0</property>
-                              </packing>
-                            </child>
-                            <child>
-                              <object class="GtkButton" id="sky_colorgradient_zenith_edit">
-                                <property name="label" translatable="yes">Edit</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">True</property>
-                                <property name="receives_default">True</property>
-                                <property name="use_action_appearance">False</property>
-                              </object>
-                              <packing>
-                                <property name="expand">True</property>
-                                <property name="fill">True</property>
-                                <property name="position">1</property>
-                              </packing>
-                            </child>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">3</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkHBox" id="hbox8">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <child>
-                              <object class="GtkImage" id="sky_colorgradient_haze">
-                                <property name="width_request">200</property>
-                                <property name="height_request">30</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">False</property>
-                                <property name="stock">gtk-missing-image</property>
-                              </object>
-                              <packing>
-                                <property name="expand">True</property>
-                                <property name="fill">True</property>
-                                <property name="position">0</property>
-                              </packing>
-                            </child>
-                            <child>
-                              <object class="GtkButton" id="sky_colorgradient_haze_edit">
-                                <property name="label" translatable="yes">Edit</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">True</property>
-                                <property name="receives_default">True</property>
-                                <property name="use_action_appearance">False</property>
-                              </object>
-                              <packing>
-                                <property name="expand">True</property>
-                                <property name="fill">True</property>
-                                <property name="position">1</property>
-                              </packing>
-                            </child>
-                          </object>
-                          <packing>
-                            <property name="left_attach">1</property>
-                            <property name="top_attach">4</property>
-                            <property name="width">1</property>
-                            <property name="height">1</property>
-                          </packing>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkButtonBox" id="buttonbox4">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="border_width">5</property>
-                        <property name="layout_style">spread</property>
-                        <child>
-                          <object class="GtkButton" id="sky_apply">
-                            <property name="label" translatable="yes">Apply</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">True</property>
-                            <property name="use_action_appearance">False</property>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">True</property>
-                            <property name="position">0</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkButton" id="sky_revert">
-                            <property name="label" translatable="yes">Cancel</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">True</property>
-                            <property name="use_action_appearance">False</property>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">True</property>
-                            <property name="position">1</property>
-                          </packing>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">True</property>
-                    <property name="position">1</property>
-                  </packing>
-                </child>
-              </object>
-              <packing>
-                <property name="position">2</property>
-              </packing>
-            </child>
-            <child type="tab">
-              <object class="GtkLabel" id="label25">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Sky</property>
-              </object>
-              <packing>
-                <property name="position">2</property>
-                <property name="tab_fill">False</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkBox" id="box3">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <child>
-                  <object class="GtkBox" id="box4">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="border_width">5</property>
-                    <property name="orientation">vertical</property>
-                    <property name="spacing">5</property>
-                    <child>
-                      <object class="GtkLabel" id="label2">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Layers</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkBox" id="box5">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <child>
-                          <object class="GtkTreeView" id="clouds_layers">
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="model">clouds_layers_model</property>
-                            <child internal-child="selection">
-                              <object class="GtkTreeSelection" id="treeview-selection2"/>
-                            </child>
-                            <child>
-                              <object class="GtkTreeViewColumn" id="treeviewcolumn3">
-                                <property name="title" translatable="yes">Altitude</property>
-                                <child>
-                                  <object class="GtkCellRendererText" id="cellrendererspin3"/>
-                                  <attributes>
-                                    <attribute name="text">0</attribute>
-                                  </attributes>
-                                </child>
-                              </object>
-                            </child>
-                            <child>
-                              <object class="GtkTreeViewColumn" id="treeviewcolumn4">
-                                <property name="title" translatable="yes">Height</property>
-                                <child>
-                                  <object class="GtkCellRendererText" id="cellrendererspin4"/>
-                                  <attributes>
-                                    <attribute name="text">1</attribute>
-                                  </attributes>
-                                </child>
-                              </object>
-                            </child>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">True</property>
-                            <property name="position">0</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkButtonBox" id="buttonbox3">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="border_width">5</property>
-                            <property name="orientation">vertical</property>
-                            <property name="spacing">5</property>
-                            <property name="layout_style">start</property>
-                            <child>
-                              <object class="GtkButton" id="button1">
-                                <property name="label" translatable="yes">Add layer</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">True</property>
-                                <property name="receives_default">True</property>
-                                <property name="use_action_appearance">False</property>
-                              </object>
-                              <packing>
-                                <property name="expand">False</property>
-                                <property name="fill">False</property>
-                                <property name="position">0</property>
-                              </packing>
-                            </child>
-                            <child>
-                              <object class="GtkButton" id="button2">
-                                <property name="label" translatable="yes">Remove layer</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">True</property>
-                                <property name="receives_default">True</property>
-                                <property name="use_action_appearance">False</property>
-                              </object>
-                              <packing>
-                                <property name="expand">False</property>
-                                <property name="fill">False</property>
-                                <property name="position">1</property>
-                              </packing>
-                            </child>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">False</property>
-                            <property name="position">1</property>
-                          </packing>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkLabel" id="label4">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Layer preview</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">2</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkEventBox" id="eventbox1">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="events">GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_STRUCTURE_MASK</property>
-                        <child>
-                          <object class="GtkImage" id="clouds_preview">
-                            <property name="width_request">256</property>
-                            <property name="height_request">256</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="stock">gtk-missing-image</property>
-                          </object>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">3</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <placeholder/>
-                </child>
-              </object>
-              <packing>
-                <property name="position">3</property>
-              </packing>
-            </child>
-            <child type="tab">
-              <object class="GtkLabel" id="label1">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Clouds</property>
-              </object>
-              <packing>
-                <property name="position">3</property>
-                <property name="tab_fill">False</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkVBox" id="vbox2">
-                <property name="width_request">280</property>
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <child>
-                  <object class="GtkTable" id="table1">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="n_rows">4</property>
-                    <property name="n_columns">2</property>
-                    <child>
-                      <object class="GtkHScale" id="render_quality">
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="margin_left">5</property>
-                        <property name="margin_right">5</property>
-                        <property name="margin_top">5</property>
-                        <property name="margin_bottom">5</property>
-                        <property name="round_digits">0</property>
-                        <property name="digits">0</property>
-                      </object>
-                      <packing>
-                        <property name="left_attach">1</property>
-                        <property name="right_attach">2</property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkLabel" id="label6">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Render quality</property>
-                      </object>
-                      <packing>
-                        <property name="x_options"></property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkLabel" id="label14">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Render width</property>
-                      </object>
-                      <packing>
-                        <property name="top_attach">1</property>
-                        <property name="bottom_attach">2</property>
-                        <property name="x_options"></property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkLabel" id="label15">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Render height</property>
-                      </object>
-                      <packing>
-                        <property name="top_attach">2</property>
-                        <property name="bottom_attach">3</property>
-                        <property name="x_options"></property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkSpinButton" id="render_width">
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="margin_left">5</property>
-                        <property name="margin_right">6</property>
-                        <property name="margin_top">5</property>
-                        <property name="margin_bottom">5</property>
-                        <property name="invisible_char">•</property>
-                        <property name="progress_pulse_step">0</property>
-                        <property name="numeric">True</property>
-                      </object>
-                      <packing>
-                        <property name="left_attach">1</property>
-                        <property name="right_attach">2</property>
-                        <property name="top_attach">1</property>
-                        <property name="bottom_attach">2</property>
-                        <property name="y_options"></property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkSpinButton" id="render_height">
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="margin_left">5</property>
-                        <property name="margin_right">5</property>
-                        <property name="margin_top">5</property>
-                        <property name="margin_bottom">5</property>
-                        <property name="invisible_char">•</property>
-                        <property name="progress_pulse_step">0</property>
-                        <property name="numeric">True</property>
-                      </object>
-                      <packing>
-                        <property name="left_attach">1</property>
-                        <property name="right_attach">2</property>
-                        <property name="top_attach">2</property>
-                        <property name="bottom_attach">3</property>
-                        <property name="y_options"></property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkLabel" id="label16">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Render mode</property>
-                      </object>
-                      <packing>
-                        <property name="top_attach">3</property>
-                        <property name="bottom_attach">4</property>
-                        <property name="x_options"></property>
-                        <property name="y_options"></property>
-                        <property name="x_padding">5</property>
-                        <property name="y_padding">5</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkBox" id="box1">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="border_width">5</property>
-                        <property name="spacing">10</property>
-                        <child>
-                          <object class="GtkRadioButton" id="rander_mode_twopass">
-                            <property name="label" translatable="yes">Two pass (recommended)</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">False</property>
-                            <property name="tooltip_text" translatable="yes">Scenery is rendered using polygons then post-processed with texturing and lighting.</property>
-                            <property name="use_action_appearance">False</property>
-                            <property name="xalign">0</property>
-                            <property name="active">True</property>
-                            <property name="draw_indicator">True</property>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">True</property>
-                            <property name="position">0</property>
-                          </packing>
-                        </child>
-                        <child>
-                          <object class="GtkRadioButton" id="render_mode_raytracing">
-                            <property name="label" translatable="yes">Ray walking</property>
-                            <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="receives_default">False</property>
-                            <property name="tooltip_text" translatable="yes">A ray is cast from the camera to find intersection with the scenery.
-This method is currently largely inaccurate and slower than two-pass rendering.</property>
-                            <property name="use_action_appearance">False</property>
-                            <property name="xalign">0</property>
-                            <property name="active">True</property>
-                            <property name="draw_indicator">True</property>
-                            <property name="group">rander_mode_twopass</property>
-                          </object>
-                          <packing>
-                            <property name="expand">False</property>
-                            <property name="fill">True</property>
-                            <property name="position">1</property>
-                          </packing>
-                        </child>
-                      </object>
-                      <packing>
-                        <property name="left_attach">1</property>
-                        <property name="right_attach">2</property>
-                        <property name="top_attach">3</property>
-                        <property name="bottom_attach">4</property>
-                        <property name="y_options"></property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkButtonBox" id="buttonbox1">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="border_width">5</property>
-                    <property name="spacing">10</property>
-                    <property name="layout_style">spread</property>
-                    <child>
-                      <object class="GtkButton" id="render_start">
-                        <property name="label" translatable="yes">Start new render</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="use_action_appearance">False</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">True</property>
-                        <property name="position">0</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkButton" id="render_show">
-                        <property name="label" translatable="yes">Show last render</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="use_action_appearance">False</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">True</property>
-                        <property name="position">1</property>
-                      </packing>
-                    </child>
-                    <child>
-                      <object class="GtkButton" id="render_save">
-                        <property name="label" translatable="yes">Save last render</property>
-                        <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="use_action_appearance">False</property>
-                      </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">True</property>
-                        <property name="position">2</property>
-                      </packing>
-                    </child>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="position">1</property>
-                  </packing>
-                </child>
-              </object>
-              <packing>
-                <property name="position">4</property>
-                <property name="tab_fill">False</property>
-              </packing>
-            </child>
-            <child type="tab">
-              <object class="GtkLabel" id="label3">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Render</property>
-              </object>
-              <packing>
-                <property name="position">4</property>
-                <property name="tab_fill">False</property>
-              </packing>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">True</property>
-            <property name="fill">True</property>
-            <property name="position">1</property>
-          </packing>
-        </child>
-      </object>
-    </child>
-  </object>
-  <object class="GtkListStore" id="noise_editor_levels_model">
-    <columns>
-      <!-- column-name Height -->
-      <column type="gdouble"/>
-      <!-- column-name Scale -->
-      <column type="gdouble"/>
-    </columns>
-    <data>
-      <row>
-        <col id="0">0</col>
-        <col id="1">0</col>
-      </row>
-    </data>
-  </object>
-</interface>