4 files changed, 29 insertions, 10 deletions
diff --git a/source/gameengine/SceneGraph/SG_IObject.cpp b/source/gameengine/SceneGraph/SG_IObject.cpp
index c347bbc6d9a..d0bdac5c8f0 100644
--- a/source/gameengine/SceneGraph/SG_IObject.cpp
+++ b/source/gameengine/SceneGraph/SG_IObject.cpp
@@ -104,7 +104,7 @@ SetSGClientObject(
 }
 
 
-	void
+	bool
 SG_IObject::
 ActivateReplicationCallback(
 	SG_IObject *replica
@@ -112,8 +112,10 @@ ActivateReplicationCallback(
 	if (m_callbacks.m_replicafunc)
 	{
 		// Call client provided replication func
-		m_callbacks.m_replicafunc(replica,m_SGclientObject,m_SGclientInfo);
+		if (m_callbacks.m_replicafunc(replica,m_SGclientObject,m_SGclientInfo) == NULL)
+			return false;
 	}
+	return true;
 };	
 
 	void
diff --git a/source/gameengine/SceneGraph/SG_IObject.h b/source/gameengine/SceneGraph/SG_IObject.h
index 438ab48c556..7f6bdfbbb1c 100644
--- a/source/gameengine/SceneGraph/SG_IObject.h
+++ b/source/gameengine/SceneGraph/SG_IObject.h
@@ -202,7 +202,7 @@ public:
 
 protected :
 
-		void
+		bool
 	ActivateReplicationCallback(
 		SG_IObject *replica
 	);
diff --git a/source/gameengine/SceneGraph/SG_Node.cpp b/source/gameengine/SceneGraph/SG_Node.cpp
index 4e90d7c4653..8de7ac83477 100644
--- a/source/gameengine/SceneGraph/SG_Node.cpp
+++ b/source/gameengine/SceneGraph/SG_Node.cpp
@@ -68,7 +68,7 @@ SG_Node* SG_Node::GetSGReplica()
 	SG_Node* replica = new SG_Node(*this);
 	if (replica == NULL) return NULL;
 
-	ProcessSGReplica(replica);
+	ProcessSGReplica(&replica);
 	
 	return replica;
 }
@@ -76,25 +76,42 @@ SG_Node* SG_Node::GetSGReplica()
 	void 
 SG_Node::
 ProcessSGReplica(
-	SG_Node* replica
+	SG_Node** replica
 ){
 	// Apply the replication call back function.
-	ActivateReplicationCallback(replica);
+	if (!ActivateReplicationCallback(*replica)) 
+	{
+		delete (*replica);
+		*replica = NULL;
+		return;
+	}
 
 	// clear the replica node of it's parent.
-	static_cast<SG_Node*>(replica)->m_SGparent = NULL;
+	static_cast<SG_Node*>(*replica)->m_SGparent = NULL;
 
 	if (m_children.begin() != m_children.end())
 	{
 		// if this node has children, the replica has too, so clear and clone children
-		replica->ClearSGChildren();
+		(*replica)->ClearSGChildren();
 	
 		NodeList::iterator childit;
 		for (childit = m_children.begin();childit!=m_children.end();++childit)
 		{
-			replica->AddChild((*childit)->GetSGReplica());
+			SG_Node* childnode = (*childit)->GetSGReplica();
+			if (childnode)
+				(*replica)->AddChild(childnode);
 		}
 	}
+	// Nodes without children and without client object are
+	// not worth to keep, they will just take up CPU
+	// This can happen in partial replication of hierarchy
+	// during group duplication.
+	if ((*replica)->m_children.empty() && 
+		(*replica)->GetSGClientObject() == NULL)
+	{
+		delete (*replica);
+		*replica = NULL;
+	}
 }
 
 
diff --git a/source/gameengine/SceneGraph/SG_Node.h b/source/gameengine/SceneGraph/SG_Node.h
index f86e3046d93..ffaaad861e2 100644
--- a/source/gameengine/SceneGraph/SG_Node.h
+++ b/source/gameengine/SceneGraph/SG_Node.h
@@ -205,7 +205,7 @@ private:
 
 		void		
 	ProcessSGReplica(
-		SG_Node* replica
+		SG_Node** replica
 	);
 
 	/**