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"Micha Riser" <mri### [at] gmx net> wrote in message
news:3d3a6e8b@news.povray.org...
> Considering two objects with ovelaping area. Like:
>
> sphere{<-1,0,0>,2 pigment{rgbt 0.8} finish{ior 1.5}}
> sphere{<1,0,0>,2 pigment{rgbt 0.8} finish{ior 1.2}}
>
> How does POV-Ray handle this? In the intersection of the spheres there are
> two ior values defined. Which one does POV use?
From what I understand, the ior value comes into play whaent he ray passes
through a surface, so any time the ray passed through a surface of either
sphere, that sphere's ior value would be applied even if the surface is
inside or intersects another surface. On the other hand, if you apply a
'merge' to these two spheres, the surfaces inside the intersection are
removed so the image would come out quiet different looking.
-tgq
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