Well I found out by my self, I just needed to delete the line : ren->Render(); but I still don't know why -- View this message in context: http://vtk.1045678.n5.nabble.com/Problem-after-having-updating-vtk-5-10-to-6-2-tp5735464p5735485.html Sent from the VTK - Users mailing list archive at Nabble.com.