Quote - Note: I think he confirms above pjz99's observation that "Irradiance Sample Size" is bounded from below by 1.0.

That was a guess, but it's a pretty safe bet - and if it doesn't have a forced minimum of greater than zero it really ought to, as a radius of zero pixels would mean infinite computation.

edit: I don't think 1.0 is the actual internal minimum though, I saw a difference in render time and quality by forcing it to be smaller.  I think the minimum is between 0.1 and 0.001 (would be silly to actually use 0.001 now that I understand what it means though).

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