If you want to see my first attempt, see "green photons render" in
povray.binaries.images.

"Simon Dyer" <sim### [at] paradisenetnz> wrote in message
news:43941e80@news.povray.org...
> I'm trying to simulate a lens as a texture in plastic, similar to the
effect
> of a lenticular or fresnel lens.
> PovRay seemed to make sense to simulate the plastic, but oh what a
learning
> curve.
>
> Wondered if anyone could point me to a texture library or tutorial to help
> in this endeavour.
>
> The plan is to design the shape ( thin plastic about 2mm thick ) and add
an
> underside repeating pattern texture that will let light arriving at the
> normal through from above but not light that hits at a tight angle.  Once
> I've simulated this in PovRay and proven it, the texture will be used in
the
> CAD-CAM thats going to tooling for the injection moulding process.  Many
of
> the engineering packages cannot do real ray tracing so they cannot
simulate
> the lens effect and I'm stuck .
>
> Any help or pointers would really be appreciated.
>
> --
>
>
>

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