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 ?


-- 
Ken Tyler -  1100+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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