POV-Ray : Newsgroups : povray.general : Artifacts when tracing somewhat high degree poly : Re: Artifacts when tracing somewhat high degree poly Server Time
28 Mar 2024 06:03:13 EDT (-0400)
  Re: Artifacts when tracing somewhat high degree poly  
From: Alain Martel
Date: 8 Dec 2022 13:56:18
Message: <63923352$1@news.povray.org>
Le 2022-12-08 à 08:06, Thomas de Groot a écrit :
light_source {
   2*<5, 10, -40>
   color White
   area_light <5, 0, 0>, <0, 0, 5>, 5, 5
   adaptive 2
   area_illumination on
   jitter
   circular
   orient
   /*fade_power 1
   fade_distance 30*/
}

Using adaptive 2 with that area_light is exactly the same as not using 
it at all as the starting grid is 5x5.
For adaptive 2 to have any benefit, the grid need to be strictly larger 
than 5 in at least one direction. So,
  area_light <5, 0, 0>, <0, 0, 5>, 9, 9
or more.

Adaptive level, starting grid
	0		2x2
	1		3x3
	2		5x5
	3		9x9
Here is the formula to know the starting grid :
(adaptive level)^2 +1


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