Only if you have limited range of depth. Toe-in will produce
keystone distortion that will make the images difficult to
view.

There is a physiological basis for the 30:1 rule. At about
30 times the distance between our eyes (2.5 inches * 30
= 70 inches) our eyes cease to converge (cross as you say)
and are essentially parallel.

All known viewing systems use images on the same plane, so images
produce through rotation of the cameras/convergence/toe-in will conflict
with the viewing system. It would be interesting to imagine a stereo
viewing system where the image planes rotate to stay oriented with
the eye as they converge (cross) to look at objects closer than the
virtual 70 inches.

Harolddd

"Christopher James Huff" <cja### [at] earthlinknet> wrote in message
news:cjameshuff-7D27A4.13453501042004@news.povray.org...
> In article <pdb_NOSPAM-174B1A.18301401042004@news.povray.org>,
>  Paul Bourke <pdb### [at] swineduau> wrote:
>
> > Regarding your proposal to "toe in" your cameras for stereo. Sure it
> > will work but try it and you will find that as you move out from the
> > center of the image you will get increasing vertical parallax
> > introduced.
>
> Well, if the images are displayed to each eye separately, on screens
> oriented to each eye, it would be best to render exactly what each eye
> would see. Two ordinary perspective cameras, rotated to focus on some
> point in the scene.
>
> However, when viewing on screen, you are viewing two projections of the
> scene on a single flat surface. My results with parallel cameras have
> been very difficult to view, but translating and shearing the cameras by
> adjusting their directions seems to produce very good results.
>
> -- 
> Christopher James Huff <cja### [at] earthlinknet>
> http://home.earthlink.net/~cjameshuff/
> POV-Ray TAG: <chr### [at] tagpovrayorg>
> http://tag.povray.org/

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