Did you check you enter the if not self.GetUpdateRegion().IsEmpty() or self.__handle: loop in the Render() method? -- View this message in context: http://vtk.1045678.n5.nabble.com/Failed-to-update-polydata-wxVTKRenderWindow-py-tp5727947p5728104.html Sent from the VTK - Users mailing list archive at Nabble.com.