diff --git a/src/graphics/rtts.cpp b/src/graphics/rtts.cpp
index 5342ac3e4..f83be6b13 100644
--- a/src/graphics/rtts.cpp
+++ b/src/graphics/rtts.cpp
@@ -290,6 +290,13 @@ RTT::~RTT()
     }
 }
 
+void RTT::prepareRender(scene::ICameraSceneNode* camera)
+{
+    irr_driver->setRTT(this);
+    irr_driver->getSceneManager()->setActiveCamera(camera);
+    irr_driver->generateDiffuseCoefficients();
+}
+
 FrameBuffer* RTT::render(scene::ICameraSceneNode* camera, float dt)
 {
     irr_driver->setRTT(this);
@@ -298,7 +305,7 @@ FrameBuffer* RTT::render(scene::ICameraSceneNode* camera, float dt)
 
     std::vector<IrrDriver::GlowData> glows;
     // TODO: put this outside of the rendering loop
-    irr_driver->generateDiffuseCoefficients();
+    //irr_driver->generateDiffuseCoefficients();
     irr_driver->computeMatrixesAndCameras(camera, m_width, m_height);
     unsigned plc = irr_driver->updateLightsInfo(camera, dt);
     irr_driver->uploadLightingData();
diff --git a/src/graphics/rtts.hpp b/src/graphics/rtts.hpp
index f0e428175..a37ba1df7 100644
--- a/src/graphics/rtts.hpp
+++ b/src/graphics/rtts.hpp
@@ -52,6 +52,8 @@ public:
 
     FrameBuffer* render(irr::scene::ICameraSceneNode* camera, float dt);
 
+    void prepareRender(scene::ICameraSceneNode* camera);
+
 private:
     unsigned RenderTargetTextures[RTT_COUNT];
     PtrVector<FrameBuffer> FrameBuffers;
diff --git a/src/guiengine/widgets/model_view_widget.cpp b/src/guiengine/widgets/model_view_widget.cpp
index c369dc580..683b3de4a 100644
--- a/src/guiengine/widgets/model_view_widget.cpp
+++ b/src/guiengine/widgets/model_view_widget.cpp
@@ -281,6 +281,8 @@ void ModelViewWidget::setupRTTScene(PtrVector<scene::IMesh, REF>& mesh,
     m_camera->setTarget(core::vector3df(0, 10, 0.0f));
     m_camera->setFOV(DEGREE_TO_RAD*50.0f);
     m_camera->updateAbsolutePosition();
+
+    m_rtt_provider->prepareRender(m_camera);
 }
 
 void ModelViewWidget::setRotateOff()