Lets push this a bit - I read somewhere here how Povray could be used to
calculate distances for us - could we get photons or rays to design each
'pixel' of  fresnel lens/lenticular to design a flat lens for a particular
purpose.  For example, provide the start and target for a light path to take
through a refractive medium, and have that medium defined by povray?

"Simon Dyer" <sim### [at] paradisenetnz> wrote in message
news:439a0280@news.povray.org...
> 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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