"RAY" <RAY### [at] yahoocom> wrote in message news:3c995155@news.povray.org...

> To do realistic refraction (two slit experiment) and if you can have the
> camera rays do this, bending of light around objects (it's there, just
VERY
> slight).

This is not refraction, but interference.  Check Young's Experiment on this
subject.
Maan

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