Keep a reference to the original scene template for as long as the instance is used

components/resource/objectcache.cpp

@@ -23,12 +23,10 @@ namespace Resource
 ObjectCache::ObjectCache():
     osg::Referenced(true)
 {
-//    OSG_NOTICE<<"Constructed ObjectCache"<<std::endl;
 }
 
 ObjectCache::~ObjectCache()
 {
-//    OSG_NOTICE<<"Destructed ObjectCache"<<std::endl;
 }
 
 void ObjectCache::addEntryToObjectCache(const std::string& filename, osg::Object* object, double timestamp)

components/resource/scenemanager.cpp

@@ -373,6 +373,10 @@ namespace Resource
     {
         osg::ref_ptr<const osg::Node> scene = getTemplate(name);
         osg::ref_ptr<osg::Node> cloned = osg::clone(scene.get(), SceneUtil::CopyOp());
+
+        // add a ref to the original template, to hint to the cache that it's still being used and should be kept in cache
+        cloned->getOrCreateUserDataContainer()->addUserObject(const_cast<osg::Node*>(scene.get()));
+
         return cloned;
     }