Do not unref a Texture's image data after applying it

apps/openmw/engine.cpp

@@ -448,7 +448,7 @@ void OMW::Engine::prepareEngine (Settings::Manager & settings)
     VFS::registerArchives(mVFS.get(), mFileCollections, mArchives, true);
 
     mResourceSystem.reset(new Resource::ResourceSystem(mVFS.get()));
-    mResourceSystem->getSceneManager()->setUnRefImageDataAfterApply(true);
+    mResourceSystem->getSceneManager()->setUnRefImageDataAfterApply(false); // keep to Off for now to allow better state sharing
     mResourceSystem->getSceneManager()->setFilterSettings(
         Settings::Manager::getString("texture mag filter", "General"),
         Settings::Manager::getString("texture min filter", "General"),

components/terrain/terraingrid.cpp

@@ -166,10 +166,6 @@ osg::ref_ptr<osg::Node> TerrainGrid::buildTerrain (osg::Group* parent, float chu
             textureCompileDummy->getOrCreateStateSet()->setTextureAttributeAndModes(dummyTextureCounter++, blendmapTextures.back());
         }
 
-        // SharedStatemanager->share(textureCompileDummy);
-
-        // Remove unrefImageDataAfterApply for better state sharing
-
         // use texture coordinates for both texture units, the layer texture and blend texture
         for (unsigned int i=0; i<2; ++i)
             geometry->setTexCoordArray(i, mCache.getUVBuffer());