thanks for the help. you can do 'toe in' stereo with two regular camera as
several posts have alluded to, but would leave parallax effects and not
technically be correct stereo. Here is a link describing toe in vs
asymmetric stereo.
http://astronomy.swin.edu.au/~pbourke/opengl/stereogl/

I'll probably go with the suggestion of using a larger picture than
necessary (with a normal camera at the center) and then trimming down (or
just requesting that pov render a subset). I've found another page that
concurs...
http://astronomy.swin.edu.au/~pbourke/stereographics/vpac/povray.html

It'd probably be nice to have as a feature another camera type called
"asymmetric", but since it can be faked with the 'rendering larger than you
need' technique, its not necessary.

Thanks,
-Dave

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