[vtkusers] Semitraparent cutting plane

[jose manjon]

Hi folks,

I have been using a cutting to cut a volume and I would like to do this plane 
semitrasparent. I have tried to do this using SetOpacity(0.2) in vtkproperty from the plane and setting 
to the mode to RepresentationSurface() but it doesn´t works.

anyone knows how can i do it?

thanks

jose manjon