diff --git a/src/graphics/rtts.cpp b/src/graphics/rtts.cpp
index 3ed8d19c8..59c836dbf 100644
--- a/src/graphics/rtts.cpp
+++ b/src/graphics/rtts.cpp
@@ -269,6 +269,7 @@ RTT::RTT(size_t width, size_t height)
 
 RTT::~RTT()
 {
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);    
     glDeleteTextures(RTT_COUNT, RenderTargetTextures);
     glDeleteTextures(1, &DepthStencilTexture);
     if (CVS->isShadowEnabled())
diff --git a/src/graphics/shader_based_renderer.cpp b/src/graphics/shader_based_renderer.cpp
index 18bb1cbc8..75db1dfc3 100644
--- a/src/graphics/shader_based_renderer.cpp
+++ b/src/graphics/shader_based_renderer.cpp
@@ -55,8 +55,13 @@ void ShaderBasedRenderer::setRTTDimensions(size_t width, size_t height)
             m_rtts = new RTT(width, height);
         }
         else
-        {
+        {    
             //same dimensions; we don't need to create a new RTT
+            //just clear FBO_COMBINED_DIFFUSE_SPECULAR
+            m_rtts->getFBO(FBO_COMBINED_DIFFUSE_SPECULAR).bind();
+            glClearColor(.5, .5, .5, .5);
+            glClear(GL_COLOR_BUFFER_BIT);
+            glBindFramebuffer(GL_FRAMEBUFFER, 0);
             return;
         }
     }