I searched the newsgroups and failed to find if anyone had tried "fiber
optics" by using photons yet and posted results here. Must be people that
have tried it too. I remember doing so, long before the photons feature
existed just to see what would happen. I didn't know any better back then.

Well, it does work now in POV-Ray 3.5, to some extent anyway. This
sphere_sweep tube uses a highly reflective interior_texture and is 100%
clear (rgbf 1) with a ior 1.5 throughout. Ends were CSG differenced away so
they wouldn't reflect there. The red cone points the same as the narrow-beam
spotlight except its tip is where the light source is located. I thought I
would get a more concentrated point of light below the opposite end. This
isn't too far off from expectations anyhow though once considering light
bounce and spreading. At least perhaps not.
--
Farewell,
Bob

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