In article <39CD33F3.E82E17FC@peak.edu.ee>, Margus Ramst 
<mar### [at] peakeduee> wrote:

> Perhaps you should try placing the grass in some slope/altitude 
> dependant pattern (although you might have to do this with trace, I'm 
> not sure if the "slope" pattern would work with eval_pigment). A line 
> of grass running straight across a dune seems a bit strange to me.

The slope pattern requires intesection information, so it will not work 
with the eval_pattern() or eval_pigment() functions. You would have to 
do your own slope pattern with the trace() function.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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