On 10 Apr 1999 19:33:04 -0500, Nieminen Mika <war### [at] cctutfi> wrote:

>Spider <spi### [at] bahnhofse> wrote:
>: Hmm, could It have someeething to do with the fact that a HF isn't a
>: "solid" that way??
>
>  HF is as solid as a plane.

Which is to say "not as solid as a sphere."  At least, not as far as
media is concerned.  But both should work okay with ior, as POV
doesn't need to know the exit point for simple refraction
calculations.  Is it possible that our protagonist is not specifying
the same IOR for the cones?

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