> It's indeed the spiral pattern in whitch the photons are shot that you
> see here.
>
> Solutions:
> Reduce spacing (suggestion: actual spacing/4 or 5) OR increase count
> (suggestion: actual count *16 to *25).
>
> Add some jitter to your photons to hide the regularity of the spiral.
>
>
> Alain

Thanks for the advice.

I had to increase jitter to 1.0 to get rid of any noticeable spiral pattern in
the caustic.

I messed around with increasing the photon count/decreasing spacing, but so far
haven't found a happy medium where the artifacts are minimized and the photons
actually take little enough memory for the scene to render (on the machine I'm
rendering this on, the program basically dies somewhere between 3-4 GB memory
used...it's an 8 GB machine).

Not complaining, I know photons ain't easy!
Just wondering if anyone knows of any other optimizations that I might not know
of that would reduce memory usage?

In the meantime I'm fiddling around with the scene itself to come up with
something where the artifacts aren't so noticeable.

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