Nathan Kopp wrote in message <37BB74D5.A01ACDB0@Kopp.com>...
>Yes.  This was a bug.  The latest version shouldn't have this bug anymore.
>As Ron pointed out, the problem is when the system expects photons but none
>were stored on the surfaces of objects.  I've added a variety of checks
>for this, so it should be fixed.


Yes, I see why that occurs.  The lens I am firing photons at is behind the
box I am focusing the photons on, so none of the photons fired at the lens
arrives anywhere.  I'll upgrade my copy of UVPov ASAP.

Thanks,
Mark

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