Le 2023-01-28 à 11:59, Cousin Ricky a écrit :
> On 2023-01-27 10:24 (-4), Alain Martel wrote:
>> Le 2023-01-26 à 14:40, Cousin Ricky a écrit :
>>> 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.
>>
>> So, shining an area_light with adaptive AND area_illumination thru a
>> small opening changes how adaptive work. Interesting.
> 
> There is no change in behavior.  The documentation reads:
> 
>    "For example area_light x,y,4,4 specifies a 4 by 4 array of lights. If
>    you specify adaptive 3 it would mean that you should start with a 9 by
>    9 array. In this case no adaptive sampling is done. The 4 by 4 array
>    is used."
> 
> There is no mention of any increase in the array size, with or without
> area_illumination.  Plus, I examined the source code, and I cannot find
> anyplace where the array size is changed after being parsed.
> 
>> Did you try without area_illumination ?
> 
> The experiment does not work without area_illumination.  The scene file
> uses an area light very close to the surface, and no shadows are involved.
> 
I've done a similar test. In that test, I did not use adaptive nor 
aera_illumination.
In my test, all the spots are sharp, not fuzzy as in your test.

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