In article <8ED7C9C44seed7@204.213.191.228>, ing### [at] homenl (ingo) 
wrote:

> From the MegaHelp:
> "The facets texture is designed to be used as a normal. Like bumps or 
> wrinkles, it is not suitable for use as a pigment. .."
> 
> "Not suitable", does this also mean it can't be used as a pigment?
> If I try, WinMegaPov gives a rendering error: problem in Evaluate_TPat.

Hmm, bumps just behaves like bozo when used in a pigment, and I often 
use wrinkles as a pigment.
But facets is not defined as an ordinary pattern, the function 
Evaluate_TPat() doesn't know what to do with it when it gets that type. 
It is handled in the surface normal code instead. I don't know how it 
could be used as a pigment or anything else other than a normal...maybe 
it could return a value between 0 and 1 depending on the angle between 
the normal perturbed with "facets" and the actual normal, but it 
wouldn't look like facets. The crackle pattern with "solid" turned on(or 
the blotches pattern) is more useful for that.
I think it should be defined in some way for pigments though, or at 
least have a parse-time error generated when someone tries to use it in 
this way.

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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