[vtkusers] performance of MIP mappers

[Mark Wyszomierski]

Hi,

I've been vtkVolumeTextureMapper3d for awhile. It's performed really well.

It looks like the best option for fast MIP rendering is:

    vtkFixedPointVolumeRayCastMapper

but this does not perform as well as vtkVolumeTextureMapper3d since it
is done in software I suppose? Is anyone working on an equivalent
mapper, maybe one using hardware?

Thanks,
Mark