I used the cylindrical camera to render the image that was applied to the
square.
I did the animation in another pov-ray file with a regular perspective camera.
Yes, this can be extended to use hemispherical lenses, which I've already done
in a previous project, seen below.
http://holographyforum.org/phpBB2/viewtopic.php?f=6&t=4427&p=35781&hilit=integrams#p35781
I'm not sure what you mean about the strong backlighting.
