The camera setup in Stereo.inc is wrong. Harolddd wrote, that only parallel
left and right cameras gives good result. He is right. Nonparallel direction
vectors causes eye divergence at large to infinite distances. Plus it's
impossible to use vista buffer because of the non-perpendicular camera
vectors.

My conclusion: Cameras built into POV-Ray cannot render a stereo pair
properly.

Proper stereo window requires:

- Stereo camera type (like StereoPov)
or
- Custom camera type with a user defined "ray vector function"
or
- Image shift (right and up vectors at different image plane positions than
0.5)

A complicated solution employs camera ray perturbation and ortographic left
and right cameras. This is untested and too complicated.

Any suggestions?

Vic

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