bepeg4d wrote:Hi Nuno,
if I have correctly understood what you wanted to say, it seems logical to me since the power is concentrated to the most complex portion of the image without losing power on the entire image, isn't it?
ciao beppe
Better understand for screenshots here.
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Multi-region (region of 1002x602 at 3840x2400) - OR 3.01.1b
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Single-region (region of 3840x2400 at 3840x2400) - OR 3.00
Both these screenshots at only 102k spp - multi-region is much more visible and much better caustics.

PMC kernel settings default except 50-diff; 52-spec; 10k-reject; caustic blur 0.000; parallelism 1
Therefore, next release of OR will render next region until rest regions after 1st region completed.