Thanks, David E DeMarle! I found the answer) I used openGL debugger, it was a great idea! :)) -- View this message in context: http://vtk.1045678.n5.nabble.com/Use-scene-lightning-as-in-VTK-in-own-OpenGL-window-without-VTK-tp5468333p5468650.html Sent from the VTK - Users mailing list archive at Nabble.com.