In article <3dce9096@news.povray.org>, Warp <war### [at] tagpovrayorg> 
wrote:

>   Of course it has, but I would be really surprised if it would be the
> same as glass has.

Depends on the plastic. "Plastic" and "glass" are far too imprecise, but 
the range of iors in plastics is probably wider than that of glasses. I 
know polycarbonate plastics can have an ior of up to 1.6. I've seen 
plastic lenses for eyeglasses with an ior of 1.66 (maybe a kind of 
polycarbonate). Plastics do usually have a lower ior though.
Don't confuse optical density with real density.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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