diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/landscape_editor/pixmap_database.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/landscape_editor/pixmap_database.h
index ce0b2a3bf..15b26e474 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/landscape_editor/pixmap_database.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/landscape_editor/pixmap_database.h
@@ -52,7 +52,7 @@ public:
 	QStringList listPixmaps() const;
 
 	/// Get original pixmap
-	/// @return QPixmap* if the image is in the database ; 
+	/// @return QPixmap* if the image is in the database ;
 	/// otherwise returns pixmap which contains error message.
 	QPixmap *pixmap(const QString &zoneName) const;
 
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/object_viewer_plugin.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/object_viewer_plugin.cpp
index f82789e66..4bc976571 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/object_viewer_plugin.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/object_viewer_plugin.cpp
@@ -68,7 +68,7 @@ QString ObjectViewerPlugin::version() const
 
 QString ObjectViewerPlugin::vendor() const
 {
-	return Core::Constants::OVQT_VENDOR;
+	return "GSoC2010_dnk-88";
 }
 
 QString ObjectViewerPlugin::description() const
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 e867f1368..05b200960 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
@@ -34,6 +34,7 @@ namespace WorldEditor
 Node::Node()
 	: m_parent(0)
 {
+	setData(Constants::PRIMITIVE_IS_VISIBLE, true);
 }
 
 Node::~Node()
@@ -102,6 +103,18 @@ void Node::insertChildNodeAfter(Node *node, Node *after)
 	node->m_parent = this;
 }
 
+void Node::insertChildNode(int pos, Node *node)
+{
+	// Node is already a child
+	nlassert(!m_children.contains(node));
+
+	// Node already has a parent
+	nlassert(!m_children.contains(node));
+
+	m_children.insert(pos, node);
+	node->m_parent = this;
+}
+
 void Node::removeChildNode(Node *node)
 {
 	nlassert(m_children.contains(node));
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 300973c55..164ee035f 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
@@ -72,6 +72,9 @@ public:
 	/// Insert node in back of the node pointed to by the pointer after.
 	void insertChildNodeAfter(Node *node, Node *after);
 
+	/// Insert node in pos
+	void insertChildNode(int pos, Node *node);
+
 	/// Return the node at index position row in the child list.
 	Node *child(int row);
 
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_model.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_model.cpp
index 690e7db08..d40453dee 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_model.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_model.cpp
@@ -214,7 +214,7 @@ Path PrimitivesTreeModel::createLandscapeNode(const QString &fileName)
 }
 
 
-Path PrimitivesTreeModel::createRootPrimitiveNode(const QString &fileName, NLLIGO::CPrimitives *primitives)
+Path PrimitivesTreeModel::createRootPrimitiveNode(const QString &fileName, NLLIGO::CPrimitives *primitives, int pos)
 {
 	if (m_worldEditNode == 0)
 		createWorldEditNode("NewWorldEdit");
@@ -223,42 +223,48 @@ Path PrimitivesTreeModel::createRootPrimitiveNode(const QString &fileName, NLLIG
 	if (!fileName.isEmpty())
 		name = fileName;
 
+	int insPos = pos;
+
 	// Get position
-	int pos = m_worldEditNode->childCount();
+	if (pos == AtTheEnd)
+		insPos = m_worldEditNode->childCount();
 
 	QModelIndex parentIndex = index(0, 0, QModelIndex());
 
 	// Add root node in tree model
-	beginInsertRows(parentIndex, pos, pos);
+	beginInsertRows(parentIndex, insPos, insPos);
 	RootPrimitiveNode *newNode = new RootPrimitiveNode(name, primitives);
-	m_worldEditNode->appendChildNode(newNode);
+	m_worldEditNode->insertChildNode(insPos, newNode);
 	endInsertRows();
 
 	newNode->setData(Constants::PRIMITIVE_FILE_IS_CREATED, !fileName.isEmpty());
 	newNode->setData(Constants::PRIMITIVE_IS_MODIFIED, false);
 
-	QModelIndex rootPrimIndex = index(pos, 0, parentIndex);
+	QModelIndex rootPrimIndex = index(insPos, 0, parentIndex);
 
 	// Scan childs items and add in the tree model
 	for (uint i = 0; i < primitives->RootNode->getNumChildren(); ++i)
 	{
 		NLLIGO::IPrimitive *childPrim;
 		primitives->RootNode->getChild(childPrim, i);
-		createChildNodes(childPrim, rootPrimIndex);
+		createChildNodes(childPrim, i, rootPrimIndex);
 	}
 
 	return pathFromIndex(rootPrimIndex);
 }
 
-Path PrimitivesTreeModel::createPrimitiveNode(NLLIGO::IPrimitive *primitive, const Path &parent)
+Path PrimitivesTreeModel::createPrimitiveNode(NLLIGO::IPrimitive *primitive, const Path &parent, int pos)
 {
 	QModelIndex parentIndex = pathToIndex(parent);
 	Node *parentNode = static_cast<Node *>(parentIndex.internalPointer());
-	int pos = parentNode->childCount();
 
-	createChildNodes(primitive, parentIndex);
+	int insPos = pos;
+	if (pos == AtTheEnd)
+		insPos = parentNode->childCount();
 
-	return pathFromIndex(index(pos, 0, parentIndex));
+	createChildNodes(primitive, insPos, parentIndex);
+
+	return pathFromIndex(index(insPos, 0, parentIndex));
 }
 
 void PrimitivesTreeModel::deleteNode(const Path &path)
@@ -271,16 +277,14 @@ void PrimitivesTreeModel::deleteNode(const Path &path)
 	removeChildNodes(node, parentIndex);
 }
 
-void PrimitivesTreeModel::createChildNodes(NLLIGO::IPrimitive *primitive, const QModelIndex &parent)
+void PrimitivesTreeModel::createChildNodes(NLLIGO::IPrimitive *primitive, int pos, const QModelIndex &parent)
 {
 	Node *parentNode = static_cast<Node *>(parent.internalPointer());
 
-	int pos = parentNode->childCount();
-
 	// Add node in the tree model
 	beginInsertRows(parent, pos, pos);
 	PrimitiveNode *newNode = new PrimitiveNode(primitive);
-	parentNode->appendChildNode(newNode);
+	parentNode->insertChildNode(pos, newNode);
 	endInsertRows();
 
 	// Scan childs items and add in the tree model
@@ -289,7 +293,7 @@ void PrimitivesTreeModel::createChildNodes(NLLIGO::IPrimitive *primitive, const
 	{
 		NLLIGO::IPrimitive *childPrim;
 		primitive->getChild(childPrim, i);
-		createChildNodes(childPrim, childIndex);
+		createChildNodes(childPrim, i, childIndex);
 	}
 }
 
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_model.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_model.h
index c3c6a3e51..c9d59e848 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_model.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_model.h
@@ -34,6 +34,8 @@ namespace WorldEditor
 class Node;
 class WorldEditNode;
 
+const int AtTheEnd = -1;
+
 typedef QPair<int, int> PathItem;
 /*
 @typedef Path
@@ -81,16 +83,16 @@ public:
 	Path createLandscapeNode(const QString &fileName);
 
 	/// Add new root primitive node and all sub-primitives in the tree model.
-	Path createRootPrimitiveNode(const QString &fileName, NLLIGO::CPrimitives *primitives);
+	Path createRootPrimitiveNode(const QString &fileName, NLLIGO::CPrimitives *primitives, int pos = AtTheEnd);
 
 	/// Add new primitive node and all sub-primitives in the tree model.
-	Path createPrimitiveNode(NLLIGO::IPrimitive *primitive, const Path &parent);
+	Path createPrimitiveNode(NLLIGO::IPrimitive *primitive, const Path &parent, int pos = AtTheEnd);
 
 	/// Delete node and all child nodes from the tree model
 	void deleteNode(const Path &path);
 
 private:
-	void createChildNodes(NLLIGO::IPrimitive *primitive, const QModelIndex &parent);
+	void createChildNodes(NLLIGO::IPrimitive *primitive, int pos, const QModelIndex &parent);
 
 	void removeChildNodes(Node *node, const QModelIndex &parent);
 
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_view.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_view.cpp
index ca329b25b..b1f5ffda9 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_view.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/primitives_view.cpp
@@ -66,7 +66,7 @@ PrimitivesView::PrimitivesView(QWidget *parent)
 	m_newPrimitiveAction = new QAction("New primitive", this);
 
 	m_deleteAction = new QAction("Delete", this);
-	m_deleteAction->setEnabled(false);
+	//m_deleteAction->setEnabled(false);
 
 	m_selectChildrenAction = new QAction("Select children", this);
 
@@ -243,6 +243,14 @@ void PrimitivesView::deletePrimitives()
 	nlassert(m_primitivesTreeModel);
 
 	QModelIndexList indexList = selectionModel()->selectedRows();
+
+	QModelIndex index = indexList.first();
+
+	PrimitiveNode *node = static_cast<PrimitiveNode *>(index.internalPointer());
+
+	if (node->primitiveClass()->Deletable)
+		m_undoStack->push(new DeletePrimitiveCommand(index, m_primitivesTreeModel, m_worldEditorScene, this));
+
 }
 
 void PrimitivesView::addNewPrimitiveByClass(int value)
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 b22e3fe64..635c7342b 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
@@ -95,7 +95,7 @@ void addNewGraphicsItems(const QModelIndex &primIndex, PrimitivesTreeModel *mode
 				radius = atof(strRadius.c_str());
 			qreal angle = ((2 * NLMISC::Pi - primPoint->Angle) * 180 / NLMISC::Pi);
 			item = scene->addWorldItemPoint(QPointF(vec->x, -vec->y + cellSize),
-											primPoint->Angle, radius, showArrow);
+											angle, radius, showArrow);
 			break;
 		}
 		case NLLIGO::CPrimitiveClass::Path:
@@ -430,6 +430,85 @@ void AddPrimitiveByClassCommand::redo()
 	addNewGraphicsItems(m_model->pathToIndex(m_newPrimIndex), m_model, m_scene);
 }
 
+DeletePrimitiveCommand::DeletePrimitiveCommand(const QModelIndex &index, PrimitivesTreeModel *model,
+		WorldEditorScene *scene, QTreeView *view, QUndoCommand *parent)
+	: QUndoCommand(parent),
+	  m_scene(scene),
+	  m_model(model),
+	  m_view(view)
+{
+	setText("Delete primitive");
+
+	// Save path to primitive
+	m_path = m_model->pathFromIndex(index);
+	m_parentPath = m_model->pathFromIndex(index.parent());
+
+	PrimitiveNode *node = static_cast<PrimitiveNode *>(index.internalPointer());
+
+	NLLIGO::IPrimitive *primitive = node->primitive();
+
+	// Backup primitive
+	m_oldPrimitive = primitive->copy();
+
+	// Backup position primitive
+	primitive->getParent()->getChildId(m_posPrimitive, primitive);
+}
+
+DeletePrimitiveCommand::~DeletePrimitiveCommand()
+{
+	delete m_oldPrimitive;
+}
+
+void DeletePrimitiveCommand::undo()
+{
+	m_scene->setEnabledEditPoints(false);
+	m_view->selectionModel()->clearSelection();
+
+	QModelIndex parentIndex = m_model->pathToIndex(m_parentPath);
+	PrimitiveNode *parentNode = static_cast<PrimitiveNode *>(parentIndex.internalPointer());
+
+	// set the primitive context
+	NLLIGO::CPrimitiveContext::instance().CurrentPrimitive = parentNode->rootPrimitiveNode()->primitives();
+
+	NLLIGO::IPrimitive *newPrimitive = m_oldPrimitive->copy();
+	if (!parentNode->primitive()->insertChild(newPrimitive, m_posPrimitive))
+		nlerror("Primitive can't insert, m_posPrimitive is not a valid.");
+
+	// Insert primitive node in tree model
+	Path newPath = m_model->createPrimitiveNode(newPrimitive, m_parentPath, m_path.back().first);
+
+	// Scan graphics model
+	addNewGraphicsItems(m_model->pathToIndex(newPath), m_model, m_scene);
+
+	// unset the context
+	NLLIGO::CPrimitiveContext::instance().CurrentPrimitive = NULL;
+}
+
+void DeletePrimitiveCommand::redo()
+{
+	m_scene->setEnabledEditPoints(false);
+	m_view->selectionModel()->clearSelection();
+
+	QModelIndex index = m_model->pathToIndex(m_path);
+	PrimitiveNode *node = static_cast<PrimitiveNode *>(index.internalPointer());
+	NLLIGO::IPrimitive *primitive = node->primitive();
+
+	// Removes all graphics items
+	removeGraphicsItems(index, m_model, m_scene);
+
+	// set the primitive context
+	NLLIGO::CPrimitiveContext::instance().CurrentPrimitive = node->rootPrimitiveNode()->primitives();
+
+	// Delete primitive
+	Utils::deletePrimitive(primitive);
+
+	// unset the context
+	NLLIGO::CPrimitiveContext::instance().CurrentPrimitive = NULL;
+
+	// Remove primitive from tree model
+	m_model->deleteNode(m_path);
+}
+
 AbstractWorldItemCommand::AbstractWorldItemCommand(const QList<QGraphicsItem *> &items,
 		WorldEditorScene *scene,
 		PrimitivesTreeModel *model,
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_actions.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_actions.h
index 17f19fbca..15a553822 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_actions.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_actions.h
@@ -156,9 +156,33 @@ private:
 	float m_delta;
 	const QString m_className;
 	Path m_parentIndex, m_newPrimIndex;
-	WorldEditorScene *m_scene;
-	PrimitivesTreeModel *m_model;
-	QTreeView *m_view;
+	WorldEditorScene *const m_scene;
+	PrimitivesTreeModel *const m_model;
+	QTreeView *const m_view;
+};
+
+/**
+@class DeletePrimitiveCommand
+@brief
+@details
+*/
+class DeletePrimitiveCommand: public QUndoCommand
+{
+public:
+	DeletePrimitiveCommand(const QModelIndex &index, PrimitivesTreeModel *model,
+						   WorldEditorScene *scene, QTreeView *view, QUndoCommand *parent = 0);
+	virtual ~DeletePrimitiveCommand();
+
+	virtual void undo();
+	virtual void redo();
+private:
+
+	Path m_path, m_parentPath;
+	uint m_posPrimitive;
+	NLLIGO::IPrimitive *m_oldPrimitive;
+	WorldEditorScene *const m_scene;
+	PrimitivesTreeModel *const m_model;
+	QTreeView *const m_view;
 };
 
 /**
@@ -186,7 +210,7 @@ private:
 
 	const QList<Path> m_listPaths;
 	PrimitivesTreeModel *const m_model;
-	WorldEditorScene *m_scene;
+	WorldEditorScene *const m_scene;
 	bool m_firstRun;
 };
 
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 9a7a834d6..0e27301d5 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
@@ -30,6 +30,7 @@ const int GRAPHICS_DATA_QT4_2D = USER_TYPE + 3;
 const int GRAPHICS_DATA_NEL3D = USER_TYPE + 4;
 const int PRIMITIVE_IS_MODIFIED = USER_TYPE + 5;
 const int PRIMITIVE_FILE_IS_CREATED = USER_TYPE + 6;
+const int PRIMITIVE_IS_VISIBLE = USER_TYPE + 7;
 
 //settings
 const char *const WORLD_EDITOR_SECTION = "WorldEditor";
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_misc.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_misc.h
index 2e7fc93b1..4163ae2e0 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_misc.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_misc.h
@@ -65,9 +65,6 @@ NLLIGO::IPrimitive *createPrimitive(const char *className, const char *primName,
 									const std::vector<NLLIGO::CPrimitiveClass::CInitParameters> &initParameters,
 									NLLIGO::IPrimitive *parent);
 
-// Remove the primitive and don't delete it.
-//void takeAtPrimitive(NLLIGO::IPrimitive *primitive);
-
 void deletePrimitive(NLLIGO::IPrimitive *primitive);
 
 bool updateDefaultValues(NLLIGO::IPrimitive *primitive);
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_window.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_window.cpp
index 2df27d7c7..ba5543776 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_window.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_window.cpp
@@ -74,7 +74,6 @@ WorldEditorWindow::WorldEditorWindow(QWidget *parent)
 	sceneModeGroup->addAction(m_ui.rotateAction);
 	sceneModeGroup->addAction(m_ui.scaleAction);
 	sceneModeGroup->addAction(m_ui.turnAction);
-	sceneModeGroup->addAction(m_ui.radiusAction);
 	m_ui.selectAction->setChecked(true);
 
 	m_ui.newWorldEditAction->setIcon(QIcon(Core::Constants::ICON_NEW));
@@ -95,8 +94,6 @@ WorldEditorWindow::WorldEditorWindow(QWidget *parent)
 	m_modeMapper->setMapping(m_ui.scaleAction, 3);
 	connect(m_ui.turnAction, SIGNAL(triggered()), m_modeMapper, SLOT(map()));
 	m_modeMapper->setMapping(m_ui.turnAction, 4);
-	connect(m_ui.radiusAction, SIGNAL(triggered()), m_modeMapper, SLOT(map()));
-	m_modeMapper->setMapping(m_ui.radiusAction, 5);
 
 	connect(m_modeMapper, SIGNAL(mapped(int)), this, SLOT(setMode(int)));
 	connect(m_ui.pointsAction, SIGNAL(triggered(bool)), m_worldEditorScene, SLOT(setEnabledEditPoints(bool)));
@@ -384,9 +381,10 @@ void WorldEditorWindow::readSettings()
 	restoreGeometry(settings->value(Constants::WORLD_WINDOW_GEOMETRY).toByteArray());
 
 	// Use OpenGL graphics system instead raster graphics system
-	if (settings->value(Constants::WORLD_EDITOR_USE_OPENGL, false).toBool())
+	if (settings->value(Constants::WORLD_EDITOR_USE_OPENGL, true).toBool())
 	{
-		m_oglWidget = new QGLWidget(QGLFormat(QGL::DoubleBuffer));
+		//m_oglWidget = new QGLWidget(QGLFormat(QGL::DoubleBuffer));
+		m_oglWidget = new QGLWidget(QGLFormat(QGL::DoubleBuffer | QGL::SampleBuffers));
 		m_ui.graphicsView->setViewport(m_oglWidget);
 	}
 
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_window.ui b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_window.ui
index 870081d47..d6d4edb28 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_window.ui
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_window.ui
@@ -27,6 +27,9 @@
       <property name="alignment">
        <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
       </property>
+      <property name="renderHints">
+       <set>QPainter::Antialiasing|QPainter::SmoothPixmapTransform|QPainter::TextAntialiasing</set>
+      </property>
       <property name="dragMode">
        <enum>QGraphicsView::NoDrag</enum>
       </property>
@@ -72,7 +75,6 @@
    <addaction name="rotateAction"/>
    <addaction name="scaleAction"/>
    <addaction name="turnAction"/>
-   <addaction name="radiusAction"/>
    <addaction name="separator"/>
    <addaction name="pointsAction"/>
   </widget>
@@ -316,17 +318,6 @@
     <string>Turn</string>
    </property>
   </action>
-  <action name="radiusAction">
-   <property name="checkable">
-    <bool>true</bool>
-   </property>
-   <property name="enabled">
-    <bool>false</bool>
-   </property>
-   <property name="text">
-    <string>Radius</string>
-   </property>
-  </action>
   <action name="pointsAction">
    <property name="checkable">
     <bool>true</bool>