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<DIV><FONT face=Arial size=2><FONT face="Times New Roman" size=3>Hello
David,<BR><BR>I finally found the source of the problem but not the
answer.<BR><BR>It is associated with using the vtkVolumeProMapper. The test
examples I was<BR>putting together with small data sets used the raycaster
without problems.<BR><BR>Attached is my test code showing the problem. If
executed without the last<BR>line then the slices appropriately do not have the
stencil applied.<BR>After executing "volumeMapper SetInput [imageStencil
GetOutput]" and<BR>updating the volPro image the slices show the stencil
applied.<BR><BR>I am using vtk4 from Feb 1, 2002 and the VolumeProVG500
card.<BR><BR>Thanks, David</FONT><BR></FONT></DIV></BODY></HTML>