On 1/26/23 14:40, Cousin Ricky wrote:
> On 2023-01-25 12:22 (-4), Alain Martel wrote:
>> Any sampling array size between those values will be silently increased
>> to the following size of the list. A 4 x 4 adaptive is really 5 x 5, 6 x
>> 6 is promoted to 9 x 9 and 10 x 10 become 17 x 17.
> Not according to my tests. The attached images were rendered with
> area_illumination to reveal the internal array of lights.
Probable complications - as best my glitchy memory serves... :-)
area_illumination essentially walks through each of the area light
positions - more or less - as originally specified; tracing each are
position in turn and coming up with a final, weight adjusted, result.
Any adaptive bits (for shadow rays only) and circular bits run at each
of the area light's effectively moving 'center' positions with
The adaptive mechanism being discussed in this thread comes into play
only during shadow ray tracing.
The circular option itself introduces some bias in the counts and
position of the area lights as the rectangular specification gets mapped
to a circular one.
--- Other misc.
There is an open github issue on the circular option occasionally
introducing visible bias in lighting results.
There is too this open github issue related specifically to
area_illumination and adaptive/circular shadow calculations not playing
I believe these github issues still unsorted in any available POV-Ray or
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