Hi, It's been a week since I asked this question. Can someone confirm it is not possible ? Or maybe my goal is not clear ? Thanks -- View this message in context: http://vtk.1045678.n5.nabble.com/On-how-to-use-vtkDecimatePro-tp4924136p4945817.html Sent from the VTK - Users mailing list archive at Nabble.com.