In article <shgslso0akn9pcm58dlljbqg9sbgg5c03u@4ax.com>, Peter Popov 
<pet### [at] usanet> wrote:

> In MegaPOV, you can use the slope pattern and give it a suitable color
> map so as to only point out the peaks. Then you can use eval_pigment
> to check against it and the place objects or whatever you like on the
> 'bumps'. Hope I made this clear enough.

The eval_pigment function won't work with the slope pattern, because 
slope requires intersection information which isn't available(POV 
doesn't know you want to check it at that point on the surface of the 
object).
However, you could do an overhead view of the height field, and use 
eval_pigment on the resulting image_map...or emulate the slope pattern 
using the trace function.

-- 
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://homepage.mac.com/chrishuff/
TAG Web page: http://tag.povray.org/

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