In article <3b18e9ea@news.povray.org>, "Bob H." <omn### [at] msncom> 
wrote:

> I can't think of a link but slope dependant texturing should do good, you
> can maybe map the grass to the surface better that way.  Use 'eval_pigment'
> and 'trace' for example.  I haven't done it though you'll need to be using
> MegaPOV.  Seems someone has, so maybe they'll stop by to tell how.

The eval_pigment() and eval_pattern() functions won't work with the 
slope pattern...the slope pattern requires a ray intersection with a 
surface, but those functions only provide a point.
However, you could use other patterns to provide variation in the grass 
through the eval_*() functions, and use the trace() function to 
implement your own slope-dependant placement. A better idea might be to 
just use one of the grass includes...I'm sure there is one with this 
stuff already implemented.

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

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