> Well, you are trying to simulate an effect over the interior of the
> object, on an object without an interior...maybe you should explain more

Exactly. Similar as normal patterns simulate bumps on a surface which is
modelled absolutley, mathematically smooth.

> clearly what you want to do. The double_illuminate flag will let the
> surface be lit from the other side, which might be enough for your
> purposes.

I'll have a look on this flag. I never heard about it.
The approach I have now is a small amount of filtering. Therefore you might
"see through a bit" which brings up lit objects of the background, giving
the illusion the light comes from the mesh. Doesn't work too bad but in some
cases you can see the contours of objects which I dont really like.

Thanks and regards
SY

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