In article <3BDAF7DB.20FED1F5@pacbell.net>, tyl### [at] pacbellnet says...

> I wouldn't necessarily classify this as a bug. It is more a limitation
> with the implementation of the normal perturbation method that POV-Ray
> uses.

Are you sure?
I just testet it now with an Isosurface and a heightfield (without a 
normal map of course).
The results are the same as with a normal.

However, this is not realistic. I tried it with a glass of water and 
placed different objects in the caustics. Leather, paper, and cloth.
In all cases the caustics remained very visible, they relative brightness 
to the rest of the object didn't chage significantly.

Lutz-Peter

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