In article <3c9506d7@news.povray.org>,
 "Corey Woodworth" <cdw### [at] mpinetnet> wrote:

> I've been looking at lots of pov images lately and I've noticed a LOT of
> images that use a so called Stacked plane clouds system. Something like
> stacking a bunch of planes with the same or similar cloud pattern on top of
> each other. How is this done? because the results look awesome and are
> supposedly pretty fast. Is their a tutorial on it?

The technique uses a bunch of partly transparent planes with 
double_illuminate (you need either MegaPOV or POV 3.5), with the 
completely transparent parts being sky and less transparent white parts 
being clouds. It basically simulates an unjittered sampling of media.
It was originally meant as a replacement for media clouds, but MegaPOV 
and POV 3.5 have new media sampling methods that make it much less 
necessary, though it is still useful sometimes.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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