Hi Anthony. I'm of little or no help, except to say that I looked at it in
3.6 and can't get the photons to work either. It's obviously not the
sunpos.inc though, because replacing that with a typical location vector has
the same affect.

Also, FYI, I'm getting a "Photons 0 (sampling 1x1)" status message when
using the 'spacing' method, doing nothing else it seems, and file cannot be
saved message you told of  if using 'count'. However, there is a "photons
shot" and number showing up in the message stream after the rendering.

Bob H.

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