Hi Jens, On 10/27/06, Jens <jens-devel at gmx.de> wrote: > Does anyone knows how to color the front of a quad in a different color > than the back? Is that possible with vtk? you can use vtkActor::SetBackfaceProperty() to choose a different instance of vtkProperty for backface rendering, maybe this is what you are looking for. HTH, Obada