[vtkusers] Stereo problem for ray cast volumes

[Aashish Chaudhary]

This one (The crystal eyes stereo image can not render well) is from the
old VTK. I am assuming that you are using OpenGL2 backend in VTK?

- Aashish

On Tue, Feb 20, 2018 at 10:41 AM gohlinchia <gohlinchia at gmail.com> wrote:

> Hi Aashish,
>
> We have tried Crystal Eyes, Anaglyph, Red-Blue and even horizontal split
> viewports mode. They all render incorrectly the same way. We have tried on
> NVIDIA and AMD graphics cards (GT640, GTX 1050 and FirePro W5170M); same
> issues too.
>
> We have downloaded ParaView 5.4.1 and activated the stereo rendering on
> volumes. Exactly the same problems on all the above hardware.
>
> We searched the forum and noticed that this problem was mentioned a few
> times before:
>
> [VTK 0011650]: The crystal eyes stereo image can not render well.
> (
> http://vtk.1045678.n5.nabble.com/VTK-0011650-The-crystal-eyes-stereo-image-can-not-render-well-tp3325497.html
> )
>
> Sounds similar but not exactly the same: Strange stereo effect with Volume
> Rendering
> (
> http://vtk.1045678.n5.nabble.com/Strange-stereo-effect-with-Volume-Rendering-tp1230876.html
> )
>
> We are currently using VTK 8.1.0 but we understand from other developers
> that they also encounter the same problems with VTK 7.1.1. The following
> image is a sample of what we see in anaglyph stereo.
>
> <http://vtk.1045678.n5.nabble.com/file/t342340/Red-Cyan_%281%29.png>
>
> The final rendered stereo image may look like it is in stereo but upon
> close
> inspection, it is not. The rendered left and right image of the volumes are
> clearly exactly the same, except that they are slightly displaced. This is
> very evident in the horizontal split viewports mode.
>
> <http://vtk.1045678.n5.nabble.com/file/t342340/Split_Viewports.png>
>
> Note that polygonal meshes are all displayed correctly in stereo, even in
> conjunction with the volumes. Do you have any idea what is wrong here?
>
> Thanks.
>
>
>
>
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