[vtkusers] Bug in stereoscopic visualization with vtkGPUVolumeRayCastMapper?

[cranium]

I'm currently using the vtkGPUVolumeRayCastMapper to visualize a volume in
stereoscopic view. By setting vtkRenderWindow.SetStereoType(4) and
vtkRenderWindow.SetStereoType(5) I generate the left and right image of a
stereoscopic pair. The output looks threedimensional, but not as it should
be. It looks like the inner parts of the volume being projected onto the
side faces of a cuboid. This cuboid appears in 3D. This becomes obvious when
you rotate it. But there is no depth difference appearing within the
textures of the side faces of the cuboid.
The problem does not occur when I use vtkFixedPointVolumeRayCastMapper
instead. The output in this case is real 3D. But I would like to prefer the
vtkGPUVolumeRayCastMapper because GPU rendering is much faster.
Is this a bug?
Did I miss something?
Any ideas?



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