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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