Where's the smoke that should be issuing up from the focal point? :-)

Why bother asking?  Of course people will want to see what the pov script
is.  Using it might prove difficult for some; luckily, I think I could
manage a smaller render within a day.
It's pretty spectacular, if not for the overall object itself then for the
great media+photons.

Bob H.

"Michael Andrews" <M.C### [at] readingacuk> wrote in message
news:3B1375D0.36393395@reading.ac.uk...
>
> I was playing with the slide projector code Ingo posted, trying to apply
> the lens equations which were also posted and using media photons to see
> the light paths.
>
> If anyone wants the modified code I'll post it.
>
> Just over 20hr render time, about a half million surface photons, one
> and a half million media photons.
>
> I am really glad I'm using a 1GHz Athlon these days ...

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