>> ray angle=-3
>> png image1.png
>> ray angle=3
>> png image2.png
>>
>
>This method of generating stereo images is correct, but also leads to
>quite a bit of vertical parallax (the so-called "toe-in" projection) -
>this is why many stereoscopic images are hard to view properly (usually,
>edges of the image are out of focus).  What you really want is a
>non-symmetric camera frustrum (dunno how hard this is to do in pymol....)
>where the two images should look along parallel vectors separated by some
>distance (something like 1/20 the focal length).  Check out Paul Bourke's
>page for all the details:
>
>http://astronomy.swin.edu.au/~pbourke/stereographics/
>
>Hope this helps.
>
>       Regards,
>       Tim F

I believe this would only be true for perspective projections, not
orthographic, since there is no real "eye" position in orthographic
projections (which are more common in molecular diagrams).  Of course, feel
free to correct me if I am wrong :)

Jonathan

*******************************************************
 Jonathan Parrish                     ph(780)-492-8249
 Alberta Synchrotron Institute   University of Alberta
 Edmonton, Alberta, Canada                     T6G 2E1
*******************************************************
 "Trusting to escape scrutiny by fixing the public gaze
upon the exceeding brightness of military glory, that
attractive rainbow that rises in showers of blood –
that serpent's eye, that charms to destroy, he plunged
into war."  -Abraham Lincoln
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