Dan Johnson wrote:

> But if you use a parabola and a point light to make a parallel light, only the
> light that bounces off the parabola is parallel, you have to block the rest of
> the light somehow.

conical spotlight

--
David Fontaine  <dav### [at] faricynet>  ICQ 55354965
My raytracing gallery:  http://davidf.faricy.net/

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