diff --git a/Makefile b/Makefile
index 3ec89b1..6e08bdf 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ release:
 	make BUILDMODE=release all
 
 tests: all
-	LD_LIBRARY_PATH=${BUILDPATH} ${BUILDPATH}/paysages-tests
+	LD_LIBRARY_PATH=${BUILDPATH} CK_DEFAULT_TIMEOUT=30 ${BUILDPATH}/paysages-tests
 
 run_cli: all
 	LD_LIBRARY_PATH=${BUILDPATH} ${BUILDPATH}/paysages-cli
diff --git a/src/editing/basepreview.cpp b/src/editing/basepreview.cpp
index 875b1de..77780a3 100644
--- a/src/editing/basepreview.cpp
+++ b/src/editing/basepreview.cpp
@@ -354,6 +354,8 @@ QWidget(parent)
     _transactions_count = 0;
     _redraw_requested = false;
 
+    _renderer = NULL;
+
     _info = new QLabel(this);
     _info->setVisible(false);
     _info->setStyleSheet("QLabel { background-color: white; color: black; }");
@@ -385,6 +387,12 @@ BasePreview::~BasePreview()
     delete _lock_drawing;
 }
 
+void BasePreview::setRenderer(PreviewRenderer* renderer)
+{
+    _renderer = renderer;
+    _renderer->bindEvent(this);
+}
+
 void BasePreview::configHdrToneMapping(bool active)
 {
     _hdr_enabled = active;
@@ -436,15 +444,26 @@ void BasePreview::reviveAll()
 
 void BasePreview::updateData()
 {
+    if (_renderer)
+    {
+        _renderer->updateEvent();
+    }
 }
 
 void BasePreview::cameraEvent()
 {
 }
 
-Color BasePreview::getColor(double, double)
+Color BasePreview::getColor(double x, double y)
 {
-    return COLOR_BLACK;
+    if (_renderer)
+    {
+        return _renderer->getColor2D(x, y, scaling);
+    }
+    else
+    {
+        return COLOR_BLACK;
+    }
 }
 
 void BasePreview::configScaling(double min, double max, double step, double init, bool logarithmic)
diff --git a/src/editing/basepreview.h b/src/editing/basepreview.h
index 0ba0add..1c11547 100644
--- a/src/editing/basepreview.h
+++ b/src/editing/basepreview.h
@@ -10,6 +10,7 @@
 #include <QLabel>
 #include <QHash>
 #include "previewosd.h"
+#include "common/previewrenderer.h"
 #include "rendering/tools/pack.h"
 #include "rendering/tools/color.h"
 
@@ -36,6 +37,8 @@ public:
     BasePreview(QWidget* parent);
     ~BasePreview();
 
+    void setRenderer(PreviewRenderer* renderer);
+
     virtual void savePack(PackStream* stream);
     virtual void loadPack(PackStream* stream);
 
@@ -51,23 +54,23 @@ public:
 
     QColor getPixelColor(int x, int y);
 
-protected:
-    virtual void updateData();
-    virtual void cameraEvent();
-    virtual Color getColor(double x, double y);
+    void addOsd(QString name);
 
     void configHdrToneMapping(bool active);
     void configScaling(double min, double max, double step, double init, bool logarithmic = true);
     void configScrolling(double xmin, double xmax, double xinit, double ymin, double ymax, double yinit);
 
-    void addOsd(QString name);
-
     void addChoice(const QString& key, const QString& title, const QStringList& choices, int init_value);
     virtual void choiceChangeEvent(const QString& key, int position);
 
     void addToggle(const QString& key, const QString& text, bool init_value);
     virtual void toggleChangeEvent(QString key, bool value);
 
+protected:
+    virtual void updateData();
+    virtual void cameraEvent();
+    virtual Color getColor(double x, double y);
+
     double xoffset;
     double yoffset;
     double scaling;
@@ -96,6 +99,8 @@ private:
 
     QLabel* _info;
 
+    PreviewRenderer* _renderer;
+
     int _width;
     int _height;
 
diff --git a/src/editing/common/freeformhelper.cpp b/src/editing/common/freeformhelper.cpp
index d603c29..1edbacf 100644
--- a/src/editing/common/freeformhelper.cpp
+++ b/src/editing/common/freeformhelper.cpp
@@ -32,17 +32,18 @@ void FreeFormHelper::startManaging()
     emit needReverting();
 }
 
-void FreeFormHelper::addPreview(BasePreview* preview)
+void FreeFormHelper::addPreview(BasePreview* preview, PreviewRenderer* renderer)
 {
     if (preview && preview->inherits("BasePreview"))
     {
         _previews.append(preview);
+        preview->setRenderer(renderer);
     }
 }
 
-void FreeFormHelper::addPreview(QString widget_name)
+void FreeFormHelper::addPreview(QString widget_name, PreviewRenderer* renderer)
 {
-    addPreview(_form_widget->findChild<BasePreview*>(widget_name));
+    addPreview(_form_widget->findChild<BasePreview*>(widget_name), renderer);
 }
 
 void FreeFormHelper::addDoubleInputSlider(WidgetSliderDecimal* slider, double* value, double min, double max, double small_step, double large_step)
diff --git a/src/editing/common/freeformhelper.h b/src/editing/common/freeformhelper.h
index 24ea354..22ea38a 100644
--- a/src/editing/common/freeformhelper.h
+++ b/src/editing/common/freeformhelper.h
@@ -16,8 +16,8 @@ public:
 
     void startManaging();
 
-    void addPreview(BasePreview* preview);
-    void addPreview(QString widget_name);
+    void addPreview(BasePreview* preview, PreviewRenderer* renderer);
+    void addPreview(QString widget_name, PreviewRenderer* renderer);
 
     void addDoubleInputSlider(WidgetSliderDecimal* slider, double* value, double min=0.0, double max=1.0, double small_step=0.0, double large_step=0.0);
     void addDoubleInputSlider(QString widget_name, double* value, double min=0.0, double max=1.0, double small_step=0.0, double large_step=0.0);
diff --git a/src/editing/common/previewrenderer.cpp b/src/editing/common/previewrenderer.cpp
new file mode 100644
index 0000000..3937c7e
--- /dev/null
+++ b/src/editing/common/previewrenderer.cpp
@@ -0,0 +1,25 @@
+#include "previewrenderer.h"
+
+PreviewRenderer::PreviewRenderer(QObject *parent) :
+    QObject(parent)
+{
+    renderer = rendererCreate();
+}
+
+PreviewRenderer::~PreviewRenderer()
+{
+    rendererDelete(renderer);
+}
+
+Color PreviewRenderer::getColor2D(double, double, double)
+{
+    return COLOR_BLACK;
+}
+
+void PreviewRenderer::bindEvent(BasePreview*)
+{
+}
+
+void PreviewRenderer::updateEvent()
+{
+}
diff --git a/src/editing/common/previewrenderer.h b/src/editing/common/previewrenderer.h
new file mode 100644
index 0000000..00e4dce
--- /dev/null
+++ b/src/editing/common/previewrenderer.h
@@ -0,0 +1,30 @@
+#ifndef PREVIEWRENDERER_H
+#define PREVIEWRENDERER_H
+
+#include <QObject>
+#include "rendering/tools/color.h"
+#include "rendering/renderer.h"
+
+class BasePreview;
+
+class PreviewRenderer : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit PreviewRenderer(QObject *parent = 0);
+    ~PreviewRenderer();
+
+    virtual void bindEvent(BasePreview* preview);
+    virtual void updateEvent();
+    virtual Color getColor2D(double x, double y, double scaling);
+
+signals:
+    
+public slots:
+    
+protected:
+    Renderer* renderer;
+};
+
+#endif // PREVIEWRENDERER_H
diff --git a/src/editing/paysages-qt.pro b/src/editing/paysages-qt.pro
index 7acb11e..290b851 100644
--- a/src/editing/paysages-qt.pro
+++ b/src/editing/paysages-qt.pro
@@ -69,7 +69,8 @@ HEADERS += \
     terrain/mainterrainform.h \
     common/freeformhelper.h \
     terrain/previewterrainshape.h \
-    common/widgetsliderdecimal.h
+    common/widgetsliderdecimal.h \
+    common/previewrenderer.h
 
 SOURCES += \
     widgetheightmap.cpp \
@@ -117,7 +118,8 @@ SOURCES += \
     terrain/mainterrainform.cpp \
     common/freeformhelper.cpp \
     terrain/previewterrainshape.cpp \
-    common/widgetsliderdecimal.cpp
+    common/widgetsliderdecimal.cpp \
+    common/previewrenderer.cpp
 
 FORMS += \
     terrain/dialogterrainpainting.ui \
diff --git a/src/editing/terrain/mainterrainform.cpp b/src/editing/terrain/mainterrainform.cpp
index c91934f..6b91d7b 100644
--- a/src/editing/terrain/mainterrainform.cpp
+++ b/src/editing/terrain/mainterrainform.cpp
@@ -2,6 +2,7 @@
 #include "ui_mainterrainform.h"
 
 #include "dialogterrainpainting.h"
+#include "previewterrainshape.h"
 #include "tools.h"
 #include "rendering/scenery.h"
 
@@ -15,7 +16,8 @@ MainTerrainForm::MainTerrainForm(QWidget *parent) :
 
     _form_helper = new FreeFormHelper(this);
 
-    _form_helper->addPreview("preview_shape");
+    _renderer_shape = new PreviewTerrainShape(_terrain);
+    _form_helper->addPreview("preview_shape", _renderer_shape);
 
     _form_helper->addDoubleInputSlider("input_scaling", &_terrain->scaling, 0.1, 3.0, 0.03, 0.3);
     _form_helper->addDoubleInputSlider("input_height", &_terrain->height, 0.0, 3.0, 0.01, 0.1);
@@ -34,6 +36,7 @@ MainTerrainForm::~MainTerrainForm()
 {
     delete _form_helper;
     delete ui;
+    delete _renderer_shape;
 
     TerrainDefinitionClass.destroy(_terrain);
 }
diff --git a/src/editing/terrain/mainterrainform.h b/src/editing/terrain/mainterrainform.h
index dcaa105..2dc1774 100644
--- a/src/editing/terrain/mainterrainform.h
+++ b/src/editing/terrain/mainterrainform.h
@@ -33,6 +33,8 @@ private:
     FreeFormHelper* _form_helper;
 
     TerrainDefinition* _terrain;
+
+    PreviewRenderer* _renderer_shape;
 };
 
 #endif // MAINTERRAINFORM_H
diff --git a/src/editing/terrain/previewterrainshape.cpp b/src/editing/terrain/previewterrainshape.cpp
index 757559c..5582f9d 100644
--- a/src/editing/terrain/previewterrainshape.cpp
+++ b/src/editing/terrain/previewterrainshape.cpp
@@ -1,22 +1,30 @@
 #include "previewterrainshape.h"
 
-PreviewTerrainShape::PreviewTerrainShape(QWidget *parent) :
-    BasePreview(parent)
+#include "basepreview.h"
+
+PreviewTerrainShape::PreviewTerrainShape(TerrainDefinition* terrain)
 {
-    _renderer = terrainCreatePreviewRenderer();
+    _terrain = terrain;
 
-    addOsd(QString("geolocation"));
-
-    configScaling(20.0, 1000.0, 20.0, 50.0);
-    configScrolling(-1000.0, 1000.0, 0.0, -1000.0, 1000.0, 0.0);
+    // TODO Don't delete the base renderer, just alter it
+    rendererDelete(renderer);
+    renderer = terrainCreatePreviewRenderer();
 }
 
-Color PreviewTerrainShape::getColor(double x, double y)
+void PreviewTerrainShape::bindEvent(BasePreview* preview)
 {
-    return terrainGetPreviewColor(_renderer, x, y, scaling);
+    preview->addOsd(QString("geolocation"));
+
+    preview->configScaling(20.0, 1000.0, 20.0, 50.0);
+    preview->configScrolling(-1000.0, 1000.0, 0.0, -1000.0, 1000.0, 0.0);
 }
 
-void PreviewTerrainShape::updateData()
+void PreviewTerrainShape::updateEvent()
 {
-    //TerrainRendererClass.bind(_renderer, _definition);
+    TerrainRendererClass.bind(renderer, _terrain);
+}
+
+Color PreviewTerrainShape::getColor2D(double x, double y, double scaling)
+{
+    return terrainGetPreviewColor(renderer, x, y, scaling);
 }
diff --git a/src/editing/terrain/previewterrainshape.h b/src/editing/terrain/previewterrainshape.h
index 4b9663c..ae54091 100644
--- a/src/editing/terrain/previewterrainshape.h
+++ b/src/editing/terrain/previewterrainshape.h
@@ -1,21 +1,23 @@
 #ifndef PREVIEWTERRAINSHAPE_H
 #define PREVIEWTERRAINSHAPE_H
 
-#include "basepreview.h"
+#include "common/previewrenderer.h"
 #include "rendering/renderer.h"
+#include "rendering/terrain/public.h"
 
-class PreviewTerrainShape : public BasePreview
+class PreviewTerrainShape : public PreviewRenderer
 {
     Q_OBJECT
 public:
-    explicit PreviewTerrainShape(QWidget *parent = 0);
+    explicit PreviewTerrainShape(TerrainDefinition* terrain);
 
 protected:
-    virtual Color getColor(double x, double y);
-    virtual void updateData();
+    virtual void bindEvent(BasePreview* preview);
+    virtual void updateEvent();
+    virtual Color getColor2D(double x, double y, double scaling);
 
 private:
-    Renderer* _renderer;
+    TerrainDefinition* _terrain;
 };
 
 #endif // PREVIEWTERRAINSHAPE_H