"alphaQuad" <alp### [at] earthlinknet> wrote in message 
news:web.488563ab2dc5bc4e358e2dfa0@news.povray.org...
> current prism material cuts light by 50%
> concave reflectors dont focus, small diameter light at least.
> convex lenses focus

nice job ..... this one might be a nice example scene to include in 3.7 
examples

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