"Grassblade" <nomail@nomail> wrote:
> I used the SDL raytracer found in the help file
> (http://www.povray.org/documentation/view/3.6.1/123/) to refine an idea
> more or less suggested by Bruno Cabasson.
> Top picture skips a ray if (square of) distance in colour-space is smaller
> than an user supplied threshold.
> Middle pic is the result of the unadulterated SDL raytracer.
> Bottom pic is the difference of the two.
> The supplied Skip-a-ray pic requires about 65-70% of the time to render.

Wow.  Not sure how it would work in a busier example or compiled in, but
sure saves time here.

 - Ricky

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