hi, In vtkRenderer.cxx $Date: 2000/08/16 22:06:07 $, $Revision: 1.153 $. 1064 os << indent << "Two-sided Lighting: " 1065 << (this->TwoSidedLighting ? "On\n" : "Off\n"); Shouldnt this read Two Sided Lighting: or TwoSidedLighting: ? Can this be changed too?? thanks prabhu