In your opinion could be usefull this example: http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/SelectPolyData? -- View this message in context: http://vtk.1045678.n5.nabble.com/Interactive-ROI-from-actors-tp5091287p5091291.html Sent from the VTK - Users mailing list archive at Nabble.com.