diff --git a/src/definition/AtmosphereDefinition.cpp b/src/definition/AtmosphereDefinition.cpp
index 7e74e9c..b760ca8 100644
--- a/src/definition/AtmosphereDefinition.cpp
+++ b/src/definition/AtmosphereDefinition.cpp
@@ -4,7 +4,7 @@
 #include "RandomGenerator.h"
 
 AtmosphereDefinition::AtmosphereDefinition(BaseDefinition* parent):
-    BaseDefinition(parent)
+    BaseDefinition(parent, "atmosphere")
 {
 }
 
diff --git a/src/definition/BaseDefinition.cpp b/src/definition/BaseDefinition.cpp
index bc0e890..8a7f942 100644
--- a/src/definition/BaseDefinition.cpp
+++ b/src/definition/BaseDefinition.cpp
@@ -2,12 +2,13 @@
 
 #include "PackStream.h"
 
-BaseDefinition::BaseDefinition(BaseDefinition* parent):
-    parent(parent)
+BaseDefinition::BaseDefinition(BaseDefinition* parent, const std::string &name):
+    parent(parent), name(name)
 {
     if (parent)
     {
         root = parent->root;
+        parent->addChild(this);
     }
     else
     {
@@ -17,9 +18,18 @@ BaseDefinition::BaseDefinition(BaseDefinition* parent):
 
 BaseDefinition::~BaseDefinition()
 {
+    if (parent)
+    {
+        parent->removeChild(this);
+        parent = NULL;
+    }
+
     for (auto child:children)
     {
-        delete child;
+        if (child->getParent() == this)
+        {
+            delete child;
+        }
     }
 }
 
@@ -40,6 +50,24 @@ Scenery* BaseDefinition::getScenery()
     }
 }
 
+std::string BaseDefinition::toString(int indent) const
+{
+    std::string result;
+    for (int i = 0; i < indent; i++)
+    {
+        result += " ";
+    }
+    result += name;
+    if (not children.empty())
+    {
+        for (auto &child: children)
+        {
+            result += "\n" + child->toString(indent + 1);
+        }
+    }
+    return result;
+}
+
 void BaseDefinition::save(PackStream* stream) const
 {
     stream->write(name);
@@ -87,6 +115,7 @@ void BaseDefinition::removeChild(BaseDefinition* child)
     std::vector<BaseDefinition*>::iterator it = std::find(children.begin(), children.end(), child);
     if (it != children.end())
     {
+        child->parent = NULL;
         children.erase(it);
     }
     else
diff --git a/src/definition/BaseDefinition.h b/src/definition/BaseDefinition.h
index 53ee936..76c8a86 100644
--- a/src/definition/BaseDefinition.h
+++ b/src/definition/BaseDefinition.h
@@ -12,7 +12,7 @@ namespace definition {
 class DEFINITIONSHARED_EXPORT BaseDefinition
 {
 public:
-    BaseDefinition(BaseDefinition* parent);
+    BaseDefinition(BaseDefinition* parent, const std::string &name);
     virtual ~BaseDefinition();
 
     virtual void save(PackStream* stream) const;
@@ -29,6 +29,11 @@ public:
     inline const BaseDefinition* getParent() const {return parent;}
     inline const BaseDefinition* getRoot() const {return root;}
 
+    /**
+     * Return a string representation of the tree (mainly for debugging purposes).
+     */
+    virtual std::string toString(int indent = 0) const;
+
 protected:
     void addChild(BaseDefinition* child);
     void removeChild(BaseDefinition* child);
diff --git a/src/definition/CameraDefinition.cpp b/src/definition/CameraDefinition.cpp
index 1f43199..1d9ca31 100644
--- a/src/definition/CameraDefinition.cpp
+++ b/src/definition/CameraDefinition.cpp
@@ -4,8 +4,8 @@
 #include "PackStream.h"
 #include "BoundingBox.h"
 
-CameraDefinition::CameraDefinition():
-    BaseDefinition(NULL)
+CameraDefinition::CameraDefinition(BaseDefinition *parent):
+    BaseDefinition(parent, "camera")
 {
     location.x = 0.0;
     location.y = 0.0;
diff --git a/src/definition/CameraDefinition.h b/src/definition/CameraDefinition.h
index 3268381..9d928e2 100644
--- a/src/definition/CameraDefinition.h
+++ b/src/definition/CameraDefinition.h
@@ -22,7 +22,7 @@ typedef struct
 class DEFINITIONSHARED_EXPORT CameraDefinition: public BaseDefinition
 {
 public:
-    CameraDefinition();
+    CameraDefinition(BaseDefinition *parent = NULL);
 
     virtual void save(PackStream* pack) const override;
     virtual void load(PackStream* pack) override;
diff --git a/src/definition/CloudLayerDefinition.cpp b/src/definition/CloudLayerDefinition.cpp
index e53e793..23922bd 100644
--- a/src/definition/CloudLayerDefinition.cpp
+++ b/src/definition/CloudLayerDefinition.cpp
@@ -6,7 +6,7 @@
 #include "PackStream.h"
 
 CloudLayerDefinition::CloudLayerDefinition(BaseDefinition* parent):
-    BaseDefinition(parent)
+    BaseDefinition(parent, "layer")
 {
     type = CIRRUS;
     altitude = 0.5;
diff --git a/src/definition/CloudsDefinition.cpp b/src/definition/CloudsDefinition.cpp
index 633828e..9ccb67f 100644
--- a/src/definition/CloudsDefinition.cpp
+++ b/src/definition/CloudsDefinition.cpp
@@ -8,9 +8,8 @@ static BaseDefinition* _layerConstructor(Layers* parent)
 }
 
 CloudsDefinition::CloudsDefinition(BaseDefinition* parent):
-    Layers(parent, _layerConstructor)
+    Layers(parent, "clouds", _layerConstructor)
 {
-    setName("clouds");
 }
 
 void CloudsDefinition::applyPreset(CloudsPreset preset)
diff --git a/src/definition/Layers.cpp b/src/definition/Layers.cpp
index fa6285a..27dd6d1 100644
--- a/src/definition/Layers.cpp
+++ b/src/definition/Layers.cpp
@@ -1,7 +1,9 @@
 #include "Layers.h"
 
-Layers::Layers(BaseDefinition* parent, LayerConstructor layer_constructor):
-    BaseDefinition(parent), layer_constructor(layer_constructor)
+#include "Logs.h"
+
+Layers::Layers(BaseDefinition* parent, const std::string &name, LayerConstructor layer_constructor):
+    BaseDefinition(parent, name), layer_constructor(layer_constructor)
 {
     max_layer_count = 100;
     null_layer = layer_constructor(this);
@@ -35,7 +37,7 @@ void Layers::copy(BaseDefinition* destination_) const
 
 Layers* Layers::newCopy() const
 {
-    Layers* result = new Layers(NULL, layer_constructor);
+    Layers* result = new Layers(NULL, getName(), layer_constructor);
     copy(result);
     return result;
 }
@@ -59,7 +61,7 @@ BaseDefinition* Layers::getLayer(int position) const
     }
     else
     {
-        qWarning("Asked for a undefined layer %d on a total of %d", position, (int)layers.size());
+        logWarning("Asked for a undefined layer %d on a total of %d", position, (int)layers.size());
         return null_layer;
     }
 }
@@ -75,7 +77,7 @@ int Layers::findLayer(BaseDefinition* layer) const
         }
         i++;
     }
-    qWarning("Layer %p (%s) not found, on a total of %d", layer, layer->getName().c_str(), (int)layers.size());
+    logWarning("Layer %p (%s) not found, on a total of %d", layer, layer->getName().c_str(), (int)layers.size());
     return -1;
 }
 
@@ -89,7 +91,7 @@ int Layers::addLayer(BaseDefinition* layer)
     }
     else
     {
-        qWarning("Add layer ignored because limit of %d reached", max_layer_count);
+        logWarning("Add layer ignored because limit of %d reached", max_layer_count);
         return -1;
     }
 }
@@ -110,7 +112,7 @@ void Layers::removeLayer(int position)
     }
     else
     {
-        qWarning("Removing unknown layer %d on %d from '%s'", position, (int)layers.size(), getName().c_str());
+        logWarning("Removing unknown layer %d on %d from '%s'", position, (int)layers.size(), getName().c_str());
     }
 }
 
diff --git a/src/definition/Layers.h b/src/definition/Layers.h
index efa888d..e940228 100644
--- a/src/definition/Layers.h
+++ b/src/definition/Layers.h
@@ -16,7 +16,7 @@ typedef BaseDefinition* (*LayerConstructor)(Layers* parent);
 class DEFINITIONSHARED_EXPORT Layers:public BaseDefinition
 {
 public:
-    Layers(BaseDefinition* parent, LayerConstructor layer_constructor);
+    Layers(BaseDefinition* parent, const std::string &name, LayerConstructor layer_constructor);
     virtual ~Layers();
 
     virtual void copy(BaseDefinition* destination) const override;
diff --git a/src/definition/PaintedGrid.cpp b/src/definition/PaintedGrid.cpp
index e2e88b1..696040b 100644
--- a/src/definition/PaintedGrid.cpp
+++ b/src/definition/PaintedGrid.cpp
@@ -7,7 +7,7 @@
 #include "PaintedGridBrush.h"
 
 PaintedGrid::PaintedGrid(BaseDefinition *parent):
-    BaseDefinition(parent)
+    BaseDefinition(parent, "grid")
 {
     merged_data = new PaintedGridData;
     brush_data = new PaintedGridData;
diff --git a/src/definition/Scenery.cpp b/src/definition/Scenery.cpp
index e9fa39c..402251e 100644
--- a/src/definition/Scenery.cpp
+++ b/src/definition/Scenery.cpp
@@ -15,7 +15,7 @@ static const double APP_HEADER = 19866544632.125;
 static const int DATA_VERSION = 1;
 
 Scenery::Scenery():
-    BaseDefinition(NULL)
+    BaseDefinition(NULL, "scenery")
 {
     addChild(atmosphere = new AtmosphereDefinition(this));
     addChild(camera = new CameraDefinition);
diff --git a/src/definition/TerrainDefinition.cpp b/src/definition/TerrainDefinition.cpp
index 45c5a18..36b0f4a 100644
--- a/src/definition/TerrainDefinition.cpp
+++ b/src/definition/TerrainDefinition.cpp
@@ -5,7 +5,7 @@
 #include "PackStream.h"
 
 TerrainDefinition::TerrainDefinition(BaseDefinition* parent):
-    BaseDefinition(parent)
+    BaseDefinition(parent, "terrain")
 {
     height = 1.0;
     scaling = 1.0;
diff --git a/src/definition/TextureLayerDefinition.cpp b/src/definition/TextureLayerDefinition.cpp
index 9eb143a..ebf3688 100644
--- a/src/definition/TextureLayerDefinition.cpp
+++ b/src/definition/TextureLayerDefinition.cpp
@@ -8,7 +8,7 @@
 #include "TerrainDefinition.h"
 
 TextureLayerDefinition::TextureLayerDefinition(BaseDefinition* parent):
-    BaseDefinition(parent)
+    BaseDefinition(parent, "texture")
 {
     terrain_zone = new Zone;
     _displacement_noise = new NoiseGenerator;
diff --git a/src/definition/TexturesDefinition.cpp b/src/definition/TexturesDefinition.cpp
index 31d12ee..9c1dc94 100644
--- a/src/definition/TexturesDefinition.cpp
+++ b/src/definition/TexturesDefinition.cpp
@@ -7,8 +7,8 @@ static BaseDefinition* _layer_constructor(Layers* parent)
     return new TextureLayerDefinition(parent);
 }
 
-TexturesDefinition::TexturesDefinition(BaseDefinition *parent)
-    : Layers(parent, _layer_constructor)
+TexturesDefinition::TexturesDefinition(BaseDefinition *parent):
+    Layers(parent, "textures", _layer_constructor)
 {
 }
 
diff --git a/src/definition/WaterDefinition.cpp b/src/definition/WaterDefinition.cpp
index e88ea03..6f98ff4 100644
--- a/src/definition/WaterDefinition.cpp
+++ b/src/definition/WaterDefinition.cpp
@@ -6,7 +6,7 @@
 #include "SurfaceMaterial.h"
 
 WaterDefinition::WaterDefinition(BaseDefinition* parent):
-    BaseDefinition(parent)
+    BaseDefinition(parent, "water")
 {
     material = new SurfaceMaterial;
     depth_color = new Color;
diff --git a/src/definition/Zone.cpp b/src/definition/Zone.cpp
index 04cf686..b109052 100644
--- a/src/definition/Zone.cpp
+++ b/src/definition/Zone.cpp
@@ -6,7 +6,7 @@
 #include "Vector3.h"
 
 Zone::Zone(BaseDefinition *parent):
-    BaseDefinition(parent)
+    BaseDefinition(parent, "zone")
 {
     value_by_height = new Curve;
     absolute_height = 1;
diff --git a/src/interface/modeler/quickapp/MainModelerWindow.cpp b/src/interface/modeler/quickapp/MainModelerWindow.cpp
index a96f5c3..4013b81 100644
--- a/src/interface/modeler/quickapp/MainModelerWindow.cpp
+++ b/src/interface/modeler/quickapp/MainModelerWindow.cpp
@@ -1,5 +1,6 @@
 #include "MainModelerWindow.h"
 
+#include "Logs.h"
 #include "OpenGLView.h"
 #include "Scenery.h"
 #include "OpenGLRenderer.h"
@@ -17,6 +18,9 @@ MainModelerWindow::MainModelerWindow()
 {
     scenery = new Scenery();
     scenery->autoPreset();
+
+    logDebug("Initialized scenery:\n%s", QString::fromStdString(scenery->toString()).toLatin1().data());
+
     renderer = new OpenGLRenderer(scenery);
 
     render_preview_provider = new RenderPreviewProvider();
diff --git a/src/tests/BaseDefinition_Test.cpp b/src/tests/BaseDefinition_Test.cpp
new file mode 100644
index 0000000..6e2e269
--- /dev/null
+++ b/src/tests/BaseDefinition_Test.cpp
@@ -0,0 +1,14 @@
+#include "BaseTestCase.h"
+
+#include "BaseDefinition.h"
+
+TEST(BaseDefinition, toString)
+{
+    BaseDefinition root(NULL, "root");
+    BaseDefinition branch(&root, "branch");
+    BaseDefinition leaf1(&branch, "leaf1");
+    BaseDefinition leaf2(&branch, "leaf2");
+
+    EXPECT_EQ("root\n branch\n  leaf1\n  leaf2", root.toString());
+    EXPECT_EQ("branch\n leaf1\n leaf2", branch.toString());
+}
diff --git a/src/tests/Layers_Test.cpp b/src/tests/Layers_Test.cpp
index 6f6a057..9fa1dfa 100644
--- a/src/tests/Layers_Test.cpp
+++ b/src/tests/Layers_Test.cpp
@@ -5,25 +5,24 @@
 
 BaseDefinition* _construc1(Layers*)
 {
-    return new BaseDefinition(NULL);
+    return new BaseDefinition(NULL, "test");
 }
 
 BaseDefinition* _construc2(Layers* parent)
 {
-    BaseDefinition* result = new BaseDefinition(parent);
-    result->setName("test");
+    BaseDefinition* result = new BaseDefinition(parent, "test");
     return result;
 }
 
 TEST(Layers, Constructor)
 {
-    Layers layers1(NULL, _construc1);
+    Layers layers1(NULL, "test", _construc1);
     EXPECT_EQ(0, layers1.count());
 }
 
 TEST(Layers, NullLayer)
 {
-    Layers layers1(NULL, _construc1);
+    Layers layers1(NULL, "test", _construc1);
 
     for (int i = -2; i < 5; i++)
     {
@@ -33,7 +32,7 @@ TEST(Layers, NullLayer)
         EXPECT_EQ(NULL, layer->getParent());
         EXPECT_EQ(layer, layer->getRoot());
 
-        EXPECT_EQ("", layer->getName());
+        EXPECT_EQ("test", layer->getName());
     }
 
     EXPECT_EQ(0, layers1.count());
@@ -41,12 +40,12 @@ TEST(Layers, NullLayer)
 
 TEST(Layers, copy)
 {
-    Layers layers1(NULL, _construc2);
+    Layers layers1(NULL, "test", _construc2);
     layers1.addLayer();
     EXPECT_EQ(1, layers1.count());
 
     // Copy with the same constructor
-    Layers layers2(NULL, _construc2);
+    Layers layers2(NULL, "test", _construc2);
     EXPECT_EQ(0, layers2.count());
     layers1.copy(&layers2);
     EXPECT_EQ(1, layers2.count());
@@ -59,7 +58,7 @@ TEST(Layers, copy)
 
 TEST(Layers, maxLayerCount)
 {
-    Layers layers1(NULL, _construc1);
+    Layers layers1(NULL, "test", _construc1);
     layers1.setMaxLayerCount(2);
 
     EXPECT_EQ(0, layers1.count());
diff --git a/src/tests/tests.pro b/src/tests/tests.pro
index cc1d578..66802c7 100644
--- a/src/tests/tests.pro
+++ b/src/tests/tests.pro
@@ -22,7 +22,8 @@ SOURCES += main.cpp \
     CanvasPortion_Test.cpp \
     CanvasPreview_Test.cpp \
     AtmosphereDefinition_Test.cpp \
-    Scenery_Test.cpp
+    Scenery_Test.cpp \
+    BaseDefinition_Test.cpp
 
 HEADERS += \
     BaseTestCase.h