Ben Chambers wrote:
> 
> Does anyone know how I can make a texture vary depending on the
> angle from which it is viewed?  I've thought about using a radial, but that
> isn't quite what I want...  As in, the angle of incidence between the
> intersecting ray and the surface normal would act as a sort of index
> into a pigment map.

There's a soluition for you : ML-Pov, a tiny MegaPOV 7 based patch,
which has an "aoi" pattern !

http://martial.rameaux.free.fr/mael/mlpovall.zip

pigment {aoi color_map {..}}

Fabien.

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