Similarly, what about vtkNormals? As you can tell, I am trying to port applications to 4.0.. Thanks. -- krs -- K.R.Subramanian Phone: (704) 687-4872 Department of Computer Science FAX: (704) 687-4893 UNC Charlotte, CARC 311 Email: krs at cs.uncc.edu Charlotte, NC 28223-0001 Web: http://www.cs.uncc.edu/~krs