diff --git a/apps/openmw/mwrender/terrainmaterial.cpp b/apps/openmw/mwrender/terrainmaterial.cpp
index a066a9bed..ae04306f6 100644
--- a/apps/openmw/mwrender/terrainmaterial.cpp
+++ b/apps/openmw/mwrender/terrainmaterial.cpp
@@ -42,11 +42,13 @@ namespace MWRender
     Ogre::MaterialPtr TerrainMaterial::Profile::generate(const Ogre::Terrain* terrain)
     {
         const Ogre::String& matName = terrain->getMaterialName();
+
+        sh::Factory::getInstance().destroyMaterialInstance (matName);
+
         Ogre::MaterialPtr mat = Ogre::MaterialManager::getSingleton().getByName(matName);
         if (!mat.isNull())
             Ogre::MaterialManager::getSingleton().remove(matName);
 
-
         mMaterial = sh::Factory::getInstance().createMaterialInstance (matName);
 
         mMaterial->setProperty ("allow_fixed_function", sh::makeProperty<sh::BooleanValue>(new sh::BooleanValue(false)));
@@ -54,6 +56,11 @@ namespace MWRender
         createPass();
 
         return Ogre::MaterialManager::getSingleton().getByName(matName);
+
+        /*
+        Ogre::MaterialPtr m = Ogre::MaterialManager::getSingleton().create(matName, Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
+        return m;
+        */
     }
 
     int TerrainMaterial::Profile::getLayersPerPass () const