On Tue, 20 Nov 2001 21:06:06 -0500, Timothy R. Cook wrote:
> Ok, I see it.  Hmm.  Is it new for 3.5?

It's new for 3.5, but there was a way to fake it in 3.1 and there was an
implementation of it in MegaPOV as well.

-- 
#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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