better place for syncing

apps/openmw/mwrender/terrain.cpp

@@ -152,16 +152,6 @@ namespace MWRender
 
                     mTerrainGroup.loadTerrain(terrainX, terrainY, true);
 
-                    // when loading from a heightmap, Ogre::Terrain does not update the derived data (normal map, LOD)
-                    // synchronously, even if we supply synchronous = true parameter to loadTerrain.
-                    // the following to be the only way to make sure derived data is ready when rendering the next frame.
-                    while (mTerrainGroup.isDerivedDataUpdateInProgress())
-                    {
-                       // we need to wait for this to finish
-                       OGRE_THREAD_SLEEP(5);
-                       Root::getSingleton().getWorkQueue()->processResponses();
-                    }
-
                     Terrain* terrain = mTerrainGroup.getTerrain(terrainX, terrainY);
                     initTerrainBlendMaps(terrain,
                                          cellX, cellY,
@@ -189,6 +179,16 @@ namespace MWRender
             }
         }
 
+        // when loading from a heightmap, Ogre::Terrain does not update the derived data (normal map, LOD)
+        // synchronously, even if we supply synchronous = true parameter to loadTerrain.
+        // the following to be the only way to make sure derived data is ready when rendering the next frame.
+        while (mTerrainGroup.isDerivedDataUpdateInProgress())
+        {
+           // we need to wait for this to finish
+           OGRE_THREAD_SLEEP(5);
+           Root::getSingleton().getWorkQueue()->processResponses();
+        }
+
         mTerrainGroup.freeTemporaryResources();
     }