diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitive_item.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitive_item.cpp
index 672bd2954..e948f8b0f 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitive_item.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitive_item.cpp
@@ -132,16 +132,6 @@ void Node::setData(int key, const QVariant &data)
 	m_data[key] = data;
 }
 
-void Node::setGraphicsData(int key, void *pointerToData)
-{
-	m_graphicsData[key] = pointerToData;
-}
-
-void *Node::graphicsData(int key) const
-{
-	return m_graphicsData[key];
-}
-
 Node *Node::parent()
 {
 	return m_parent;
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitive_item.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitive_item.h
index 01c96c9d2..4940a622b 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitive_item.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitive_item.h
@@ -35,9 +35,6 @@ class RootPrimitiveNode;
 class LandscapeNode;
 class PrimitiveNode;
 
-const int GRAPHICS_DATA_QT2D = 0;
-const int GRAPHICS_DATA_NEL3D = 1;
-
 /*
 @class Node
 @brief
@@ -93,10 +90,6 @@ public:
 	/// Return this node's custom data for the key key as a QVariant.
 	QVariant data(int key) const;
 
-	void setGraphicsData(int key, void *pointerToData);
-
-	void *graphicsData(int key) const;
-
 	/// Return a type this node.
 	virtual NodeType type() const;
 
@@ -106,7 +99,6 @@ private:
 	Node *m_parent;
 	QList<Node *> m_children;
 	QHash<int, QVariant> m_data;
-	QHash<int, void *> m_graphicsData;
 };
 
 /*
@@ -183,4 +175,6 @@ private:
 
 } /* namespace WorldEditor */
 
+Q_DECLARE_METATYPE(WorldEditor::Node *)
+
 #endif // PRIMITIVE_ITEM_H
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_actions.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_actions.cpp
index a654e8f31..4f69181c8 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_actions.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_actions.cpp
@@ -16,6 +16,7 @@
 
 // Project includes
 #include "world_editor_actions.h"
+#include "world_editor_constants.h"
 #include "world_editor_misc.h"
 #include "primitive_item.h"
 #include "world_editor_scene.h"
@@ -37,6 +38,7 @@
 
 // Qt includes
 #include <QModelIndex>
+#include <QPersistentModelIndex>
 
 namespace WorldEditor
 {
@@ -89,8 +91,13 @@ void addNewGraphicsItems(const QModelIndex &primIndex, PrimitivesTreeModel *mode
 			break;
 		}
 		}
+		QVariant variantNode;
+		variantNode.setValue<Node *>(node);
+		item->setData(Constants::WORLD_EDITOR_NODE, variantNode);
 
-		node->setGraphicsData(GRAPHICS_DATA_QT2D, item);
+		QVariant graphicsData;
+		graphicsData.setValue<QGraphicsItem *>(item);
+		node->setData(Constants::GRAPHICS_DATA_QT4_2D, graphicsData);
 	}
 
 	int count = model->rowCount(primIndex);
@@ -112,7 +119,7 @@ void removeGraphicsItems(const QModelIndex &primIndex, PrimitivesTreeModel *mode
 		case NLLIGO::CPrimitiveClass::Path:
 		case NLLIGO::CPrimitiveClass::Zone:
 		{
-			QGraphicsItem *item = static_cast<QGraphicsItem *>(node->graphicsData(GRAPHICS_DATA_QT2D));
+			QGraphicsItem *item = qvariant_cast<QGraphicsItem *>(node->data(Constants::GRAPHICS_DATA_QT4_2D));
 			if (item != 0)
 				delete item;
 			break;
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_constants.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_constants.h
index 5c1d32908..e0bdc4705 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_constants.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_constants.h
@@ -1,5 +1,4 @@
 // Object Viewer Qt - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
-// Copyright (C) 2010  Winch Gate Property Limited
 // Copyright (C) 2011  Dzmitry Kamiahin <dnk-88@tut.by>
 //
 // This program is free software: you can redistribute it and/or modify
@@ -24,6 +23,12 @@ namespace Constants
 {
 const char *const WORLD_EDITOR_PLUGIN	= "WorldEditor";
 
+const int USER_TYPE = 65536;
+const int NODE_PERISTENT_INDEX = USER_TYPE + 1;
+const int WORLD_EDITOR_NODE = USER_TYPE + 2;
+const int GRAPHICS_DATA_QT4_2D = USER_TYPE + 3;
+const int GRAPHICS_DATA_NEL3D = USER_TYPE + 4;
+
 //settings
 const char *const WORLD_EDITOR_SECTION = "WorldEditor";
 const char *const WORLD_WINDOW_STATE = "WorldWindowState";