/** Overridden from SceneManager */
    void PCZSceneManager::_renderScene(Camera* cam, Viewport *vp, bool includeOverlays)
    {
		// notify all the zones that a scene render is starting
		ZoneMap::iterator i;
		PCZone * zone;
		for (i = mZones.begin(); i != mZones.end(); i++)
		{
			zone = i->second;
	        zone->notifyBeginRenderScene();
		}

		// do the regular _renderScene
        SceneManager::_renderScene(cam, vp, includeOverlays);
    }