[vtkusers] Image plane widget + color transfer function?

[Paul Melis]

Hello,

Is there any way to accomplish the following:
1. Given a structured points set of integers (cell counts generated by a 
simulation, in this case)
2. Define a color transfer function based on threshold values (i.e. 
0..999 cells - red, 1000-99999 green, etc).
3. Use a vtkImagePlaneWidget to slice through the volume using the above 
c.t.f.

I can't seem to get it done without a lot of hoops to jump through. The 
problem lies in the fact that the vtkImagePlaneWidget can not use a 
c.t.f., only a vtkLookupTable.
For this dataset the scalar values have a range of roughly [0,1500000] 
requiring a large lookup-table if done with vtkLookupTable, which feels 
like I'm abusing the class.

Thanks in advance for any help,
Paul