diff --git a/EgtGraphics.rc b/EgtGraphics.rc
index 679cdcb..e658069 100644
Binary files a/EgtGraphics.rc and b/EgtGraphics.rc differ
diff --git a/SceneCamera.cpp b/SceneCamera.cpp
index f61df93..fc0fead 100644
--- a/SceneCamera.cpp
+++ b/SceneCamera.cpp
@@ -202,12 +202,8 @@ Scene::CalcDirUp( void)
   // direzione perpendicolare giacente nel piano XY
   // ( m_vtDirCamera è opposta alla direzione in cui si guarda) 
    Vector3d vtPerpXY = m_vtDirCamera ^ Z_AX ;
-   if ( ! vtPerpXY.Normalize()) {
-      if ( m_vtDirCamera.z < 0)
-         vtPerpXY = X_AX ;
-      else
-         vtPerpXY = - X_AX ;
-   }
+   if ( ! vtPerpXY.Normalize())
+      vtPerpXY = -X_AX ;
   // direzione Up
    m_vtUp = vtPerpXY ^ m_vtDirCamera ;
    m_bUpOk = m_vtUp.Normalize() ;