"Thomas de Groot" <t.d### [at] internlDOTnet> wrote:
> I won't pretend that I fully understand the method used to obtain the
> surface but it seems to do a good job for a (relatively) simple surface. Do
> you mean that overhangs could occlude the center from 'higher' surfaces?

Overhangs would be occluded from the centre by the lower surface. That's
probably what you meant anyway! It's little more than a spherical height-field
to be honest, there may well be macros already out there to do this sort of
thing.

I should point out that the tetrahedron is not a continuous surface; it is built
from hundreds of copies of such a simple rock shape, rotated and scaled
according to position.

> If you have time to port
> that out to the community, I (at least) would be very grateful. I can
> imagine a lot of applications.

It's quite a simple bit of code. I don't have it on this computer but I'll try
post it tomorrow!

Bill

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