"DLM" <mae### [at] combumbiumdedu> schreef in bericht
news:42d433ae$1@news.povray.org...
> I think the problem is that you are using an obliquely illuminated coin
> image as a proxy for a heightfield.
>
> For this problem you might get experimental and scan a coin - immersed in
a
> puddle of  red or green food coloring.
> The resulting image should have highlights where the optical path through
> the food coloring is the shortest.
> Crop / filter / scale / reformat as required using your favorite image
> editor.
>

Hey! That's a nice trick!  :-))

Thomas

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