OK, I think I have found the problem, I think it is the "normal on" in the
radiosity settings, the problem only seems to show up with fairly high
count values though and I think it is because some of my normals are set
very high. Never had this problem before but I am fairly sure it is to do
with this. I changed to using normals as I was using isosurfaces before but
the render times were too slow for this IRTC round deadline.

Sean

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