TinCanMan wrote:
> 
> Doing this, you essentially increase the number of surfaces as you can't
> have coincidental surfaces.
> 

An alternative would be to allow objects be (compleatly) inside another. So 
that the water object would have a list of its 'internal' objects. Tracing 
ray inside the water would then only test for these interal objects and the 
water container. Outside the water the interal objects would not have to be 
considered.

- Micha

-- 
http://objects.povworld.org - the POV-Ray Objects Collection

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