Ken <tyl### [at] pacbellnet> writes:

> 2. (Fine Arts) The color or incrustation which age gives to works of art;
> especially, the green rust which covers ancient bronzes, coins, and medals.
> 
>  It is quite common to see a patina discoloration inside the cracks,
> crevices, and deep folds on sculpture while it's surface maintains
> more of the original material's coloration.
> 
>  How would one apply this affect to a 3d object with proceedural methods
> rather than relying upon complicated image maps ?

I'm not sure whether you're looking for an automatic generation of
patinas or a completely procedural approach. In the first case, you
should have a look at:

Modeling and Rendering of Metallic Patinas
Julie Dorsey and Pat Hanrahan 
http://graphics.lcs.mit.edu/~dorsey/papers/patina/

I hope this helps
Thomas

-- 
http://thomas.willhalm.de/
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