have a look at this http://www.vtk.org/Wiki/VTK/Examples/Cxx/ImageData/IterateImageData -- View this message in context: http://vtk.1045678.n5.nabble.com/fill-vtkImageData-in-3D-tp3331674p3332395.html Sent from the VTK - Users mailing list archive at Nabble.com.