[vtkusers] picking voxel value in a rendered scene

[Christian Arens]

Hi there,

i want to pick the voxel value of each voxel (x-y-z- direction) in a 
rendered scene.

www.bilderhoster.net/w6wgtzjn.png.html
This image shows an example scene full of polydata objects.

I tried to use the CellPicker and the WorldPicker but i did not get the 
voxel values.
Anybody has got an idea?

best regards
Christian