[vtkusers] Using VTK to "peel layers" from a volume surface

[sarah damiani]

Hello,
    I am using VTK to visualize a 3D grid of cellular automata. What I hope 
to end up with are the automata displayed as points on a cylinder, sphere, 
or torus where I can then peel off the outside layers in order to observe 
inner structures of the automata. Does anyone know if/how VTK can be used to 
"peel away layers" in this fashion? I am using Tcl/Tk to write the scripts. 
Thanks in advance,

Sarah
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