Thank you. However, it is a new class since VTK 5.10. I am using vtk 5.8. Any similar class could be used in vtk 5.8? -- View this message in context: http://vtk.1045678.n5.nabble.com/Image-is-unclear-tp5706802p5707136.html Sent from the VTK - Users mailing list archive at Nabble.com.