Shay wrote:
> Would you provide a link to this reference?

http://www.aetec.ee/fv/vkhomep.nsf/dd5cab6801f1723585256474005327c8/b82cb3356d5285c542256983006016ed?OpenDocument
See the "fake clouds #2" example (somewhere in the middle of the page).
His code is in Renderman shading language, while I was trying to see if
anything was possible in POV 3.5.

> The clouds look good in this small pic. Is this really slower than media?

Well, I suppose it not really an honest comparison, simply because I am
not sure how you actually would approach a comparison - there are so
many ways of accomplishing a thing. However, compared with my general
media experiences, I'd say it's hardly faster. 

Abe

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