On Sun, 21 Jul 2002 20:28:17 +0200, Micha Riser wrote:
> IMO it is a bug in POV-Ray. The ray passes through the box and is refracted 
> when it leaves it. That means it is refracted even though the ior before 
> the hit and after the hit both are 1.0.

Careful what you call a bug.  You seem to be concerned that POV-Ray does 
something unrealistic when you present it with a situation that cannot exist
in reality.  Why is this a problem?

-- 
#macro R(L P)sphere{L F}cylinder{L P F}#end#macro P(V)merge{R(z+a z)R(-z a-z)R(a
-z-z-z a+z)torus{1F clipped_by{plane{a 0}}}translate V}#end#macro Z(a F T)merge{
P(z+a)P(z-a)R(-z-z-x a)pigment{rgbt 1}hollow interior{media{emission T}}finish{
reflection.1}}#end Z(-x-x.2y)Z(-x-x.4x)camera{location z*-10rotate x*90}

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