[vtkusers] clip volume to form a hole inside the volume.

[Jianlong Zhou]

Dear all,

My data is 3D volume data. I defined a sphere shape region and  want to clip 
out this sphere region to render the other part of the volume with direct 
volume rendering.

Would someone suggest me how to clip out the sphere region and render 
the left part of the volume? I am using vtk3.2.

Thanks in advance.

Jianlong