"Daniel Matthews" <lig### [at] bigpondnetau> wrote in message
news:352### [at] 3-enet...
> A grime shader would bring out the detail in a natural looking way.
> Basically the color should get darker on concave areas where there is a
> large normal variance over a sampled area. You could limit this to normals
> within a certain range of "up" if you with to simulate the fallout of
> pollution collecting in surface details.
>
> Has anyone done this in POV yet?

A gradient layered texture would do that, somewhat anyway.

> > This is fun!

And it also looks like fun.  I've been watching along the way.

Bob H.

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