> Is there some sort of flag that allows cameras to computer distance using
> the distance eqation (Sqrt(x^2+y^2+z^2))?

POV-Ray's camera code doesn't compute distance anywhere; and if it did, I'm
sure it would use that equation anyway. What is it that you're trying to
change?

> I know fish eye lens appears gives something similar

Similar to what?

 - Slime
 [ http://www.slimeland.com/ ]

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