I might not have posted on a proper group. If I should have chosen the
povray.newusers, please don't hesitate to tell me as such.
Well, since I am still not very much acquainted with the POV-ray yet, I am
not sure whether this topic is rather absurd or not.
When a calcite crystal is laid on a page of newspaper, the characters would
form double images. The refractive indices of the clacite crystal are 1.6584
and 1.4864(n0 and ne, respectively)["Optics",p.337, Hecht]
Would it be possible with some effort to simulate this phenomena for
birefringent materials in the POV-ray 3.5?
Are there any such programs to support this function other than POV?

Thank you for your interest in this regard,

Jong

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