[vtkusers] Clarification needed for Volume Rendering using vtk

[puneet agrawal]

hi all,
I am using VTK fixed ray cast Mapper for rendering my medical image
data.But I need to improve its quality.Can Anyone help me out on
this.Is there technique.What about supersampling.is vtk fixed raycast
mapper uses supersampling or is there any way we can use this
supersampling.
I also use VTKEdge fixed raycast mapper but it just gives me
performance improvement with no quality improvement.

Thanks
puneet