[vtkusers] vtkVolumeRaycastMapper and vtkRenderLargeImage

[Kevin H. Hobbs]

On Thu, 2009-04-02 at 10:17 -0400, Simon Drouin wrote:
> Hi all,
> 
> Using vtkVolumeRaycastMapper for volume rendering in conjunction with
> vtkRenderLargeImage with a magnification factor of 2 produces images
> with a black column of pixels in the middle of the image. The same
> scene rendered with vtkVolumeTextureMapper3D is perfectly fine. I get
> the same result both on windows XP (MSVC 9) and OSX.
> 
> I suppose the problem is that vtkVolumeRaycastMapper doesn't render
> the last (or the first) column of pixels, which doesn't show too much
> when it is on the side of the window. When using vtkRenderLargeImage
> with a magnification of 2, the last column of the first block ends up
> in the center of the screen.
> 
> Has anyone tried to address this problem yet? I might dive into it if
> I have time soon, though I'm a little bit affraid of the
> vtkRaycastMapper code :-)
> 
> s.

I think the same thing (same cause) happens in ParaView when volume
rendering in parallel and when saving a volume rendering larger than the
window size. Both issues have been discussed on the list but I can't,
for the life of me find those e-mails.
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