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 a75e2148b..d0617373e 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
@@ -32,6 +32,10 @@ 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;
 
+//properties editor
+const char *const DIFFERENT_VALUE_STRING = "<different values>";
+const char *const DIFFERENT_VALUE_MULTI_STRING = "<diff>";
+
 //settings
 const char *const WORLD_EDITOR_SECTION = "WorldEditor";
 const char *const WORLD_WINDOW_STATE = "WorldWindowState";
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_misc.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_misc.cpp
index 6db59f9e5..dc1ae435f 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_misc.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_misc.cpp
@@ -171,7 +171,7 @@ bool loadWorldEditFile(const std::string &fileName, WorldEditList &worldEditList
 														NLLIGO::CPrimitives ligoPrimitives;
 
 														// Read it
-														ligoPrimitives.read(primitives, fileName.c_str(), *NLLIGO::CPrimitiveContext::instance().CurrentLigoConfig);
+														ligoPrimitives.read(primitives, fileName.c_str(), *ligoConfig());
 														//_DataHierarchy.back ().Primitives.read (primitives, filename, theApp.Config);
 
 														// Set the filename
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_scene.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_scene.cpp
index ba67ab9a8..9922daaf7 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_scene.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_scene.cpp
@@ -181,7 +181,7 @@ void WorldEditorScene::mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent)
 {
 	m_firstPick = mouseEvent->scenePos();
 
-	if (m_pointsMode)
+	if (isEnabledEditPoints())
 	{
 		m_polygons = polygonsFromItems(m_selectedItems);
 
@@ -288,6 +288,8 @@ void WorldEditorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent)
 
 	if (mouseEvent->button() == Qt::LeftButton)
 	{
+		checkUndo();
+
 		// Update selection
 		if ((m_selectionArea.left() != 0) && (m_selectionArea.right() != 0))
 		{
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_scene_item.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_scene_item.h
index b5584c427..9752d783d 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_scene_item.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/world_editor/world_editor_scene_item.h
@@ -223,10 +223,8 @@ public:
 	WorldItemZone(const QPolygonF &polygon, QGraphicsItem *parent = 0);
 	virtual ~WorldItemZone();
 
-
 	virtual void setColor(const QColor &color);
 	virtual bool removeSubPoint(WorldItemSubPoint *subPoint);
-
 	virtual QPainterPath shape() const;
 	virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
 
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 40e69d1f2..1e6d44ff6 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
@@ -384,8 +384,8 @@ void WorldEditorWindow::readSettings()
 	// Use OpenGL graphics system instead raster graphics system
 	if (settings->value(Constants::WORLD_EDITOR_USE_OPENGL, true).toBool())
 	{
-		//m_oglWidget = new QGLWidget(QGLFormat(QGL::DoubleBuffer));
-		m_oglWidget = new QGLWidget(QGLFormat(QGL::DoubleBuffer | QGL::SampleBuffers));
+		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 d6d4edb28..d9b6f8ac3 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
@@ -28,7 +28,7 @@
        <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
       </property>
       <property name="renderHints">
-       <set>QPainter::Antialiasing|QPainter::SmoothPixmapTransform|QPainter::TextAntialiasing</set>
+       <set>QPainter::SmoothPixmapTransform</set>
       </property>
       <property name="dragMode">
        <enum>QGraphicsView::NoDrag</enum>