diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/core_constants.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/core_constants.h
index eb59cddd2..a3b7c0d72 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/core_constants.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/core_constants.h
@@ -77,7 +77,7 @@ const char * const DATA_PATH_SECTION = "DataPath";
 const char * const SEARCH_PATHS = "SearchPaths";
 const char * const RECURSIVE_SEARCH_PATHS = "RecursiveSearchPathes";
 const char * const LEVELDESIGN_PATH = "LevelDesignPath";
-const char * const ASSETS_PATH = "LevelDesignPath";
+const char * const ASSETS_PATH = "AssetsPath";
 
 //resources
 const char * const ICON_NEL = ":/core/images/nel.png";
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
index 9a67abb80..759e8f304 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
@@ -38,6 +38,9 @@ QNLWidget::QNLWidget(QWidget *parent)
 	  m_initialized(false),
 	  m_interval(25)
 {
+	setAttribute(Qt::WA_OpaquePaintEvent);
+	setAttribute(Qt::WA_NoSystemBackground);
+	setAttribute(Qt::WA_PaintOnScreen);
 	setMouseTracking(true);
 	setFocusPolicy(Qt::StrongFocus);
 
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/global_wind_form.ui b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/global_wind_form.ui
index 971d16c60..bb266f650 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/global_wind_form.ui
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/global_wind_form.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>195</width>
-    <height>64</height>
+    <width>192</width>
+    <height>52</height>
    </rect>
   </property>
   <property name="maximumSize">
@@ -21,6 +21,12 @@
   </property>
   <widget class="QWidget" name="dockWidgetContents">
    <layout class="QGridLayout" name="gridLayout">
+    <property name="margin">
+     <number>3</number>
+    </property>
+    <property name="spacing">
+     <number>3</number>
+    </property>
     <item row="1" column="1" colspan="2">
      <widget class="QSlider" name="horizontalSlider">
       <property name="maximum">
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/graphics_viewport.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/graphics_viewport.cpp
index 2a15932b7..7eaed0a1b 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/graphics_viewport.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/graphics_viewport.cpp
@@ -49,6 +49,9 @@ namespace NLQT
 CGraphicsViewport::CGraphicsViewport(QWidget *parent)
 	: QNLWidget(parent)
 {
+	setAttribute(Qt::WA_OpaquePaintEvent);
+	setAttribute(Qt::WA_NoSystemBackground);
+	setAttribute(Qt::WA_PaintOnScreen);
 }
 
 CGraphicsViewport::~CGraphicsViewport()
@@ -77,7 +80,7 @@ void CGraphicsViewport::release()
 {
 	//H_AUTO2
 	nldebug("CGraphicsViewport::release");
-	
+
 	Modules::veget().release();
 	Modules::psEdit().release();
 	Modules::objView().release();
@@ -119,39 +122,6 @@ void CGraphicsViewport::resizeEvent(QResizeEvent *resizeEvent)
 		Modules::objView().setSizeViewport(resizeEvent->size().width(), resizeEvent->size().height());
 }
 
-#if defined(NL_OS_MAC)
-// Qt does not provide wheel events through winEvent() and macEvent() (but it 
-// does through x11Event(), which is inconsistent...)  
-// Workaround is to handle wheel events like implemented below.
-//
-// TODO: this is not a clean solution, because all but wheel events are 
-// handled using winEvent(), x11Event(), macEvent(). But this seems to be a 
-// limitation of current (4.7.1) Qt versions. (see e.g. qapplication_mac.mm)
-void CGraphicsViewport::wheelEvent(QWheelEvent *event)
-{
-	// Get relative positions.
-	float fX = 1.0f - (float)event->pos().x() / this->width();
-	float fY = 1.0f - (float)event->pos().y() / this->height();
-
-	// Get the buttons currently pressed.
-	uint32 buttons = NLMISC::noButton;
-	if(event->buttons() & Qt::LeftButton)        buttons |= NLMISC::leftButton;
-	if(event->buttons() & Qt::RightButton)       buttons |= NLMISC::rightButton;
-	if(event->buttons() & Qt::MidButton)         buttons |= NLMISC::middleButton;
-	if(event->modifiers() & Qt::ControlModifier) buttons |= NLMISC::ctrlButton;
-	if(event->modifiers() & Qt::ShiftModifier)   buttons |= NLMISC::shiftButton;
-	if(event->modifiers() & Qt::AltModifier)     buttons |= NLMISC::altButton;
-
-	if(event->delta() > 0)
-		Modules::objView().getDriver()->EventServer.postEvent(
-			new NLMISC::CEventMouseWheel(-fX, fY, (NLMISC::TMouseButton)buttons, true, NULL));
-	else
-		Modules::objView().getDriver()->EventServer.postEvent(
-			new NLMISC::CEventMouseWheel(-fX, fY, (NLMISC::TMouseButton)buttons, false, NULL));
-}
-#endif // defined(NL_OS_MAC)
-
-
 #if defined(NL_OS_WINDOWS)
 
 typedef bool (*winProc)(NL3D::IDriver *driver, HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/graphics_viewport.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/graphics_viewport.h
index 00b2c80d2..d810d8c01 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/graphics_viewport.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/graphics_viewport.h
@@ -80,10 +80,6 @@ private Q_SLOTS:
 protected:
 	virtual void resizeEvent(QResizeEvent *resizeEvent);
 
-#if defined(NL_OS_MAC)
-	virtual void wheelEvent(QWheelEvent *event);
-#endif
-
 #if defined(NL_OS_WINDOWS)
 	virtual bool winEvent(MSG *message, long *result);
 #elif defined(NL_OS_MAC)
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/tune_timer_form.ui b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/tune_timer_form.ui
index f2f883263..8288747ce 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/tune_timer_form.ui
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/object_viewer/tune_timer_form.ui
@@ -6,14 +6,14 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>460</width>
-    <height>64</height>
+    <width>452</width>
+    <height>52</height>
    </rect>
   </property>
   <property name="minimumSize">
    <size>
-    <width>86</width>
-    <height>64</height>
+    <width>0</width>
+    <height>0</height>
    </size>
   </property>
   <property name="features">
@@ -24,6 +24,12 @@
   </property>
   <widget class="QWidget" name="dockWidgetContents">
    <layout class="QGridLayout" name="gridLayout">
+    <property name="margin">
+     <number>3</number>
+    </property>
+    <property name="spacing">
+     <number>3</number>
+    </property>
     <item row="0" column="0">
      <widget class="QSlider" name="horizontalSlider">
       <property name="maximum">