"Simon Dyer" <sim### [at] paradisenetnz> wrote:

>I've been designing a plastic lens and using POV's mesh2 object type to
>raytrace and visualise the results.
>
>The iterations are taking too long.
>
>What I want to do is define a bounding area I want the light to shine into,
>and a spot light or lite material, and have POV design the lens between and
>output the results as a mesh.

Have you already tried the intersection of two CSG-speres? That's just 
what real spheric optical lenses are.
And I guess, POV-Ray can handle it quite efficient.
And you wouldn't get aberration caused by the facets of your mesh-lenses.



Best regards,

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