> light_source { <0,10,0> rgb <0.90, 0.85, 0.75>*5
> spotlight point_at <0,0,0> radius 48 falloff 66
> area_light x*0.67 z*0.67 5,5 adaptive 2 circular orient
> fade_power 2 fade_distance FD*2
> projected_through {Ceiling}
> }
>
> -Ive

Here, adaptive have no effect.
adaptive 1 start at 3 by 3
adaptive 2 start at 5 by 5
adaptive 3 start at 9 by 9
...

area_light x*0.67 z*0.67 9,9 adaptive 2 circular orient only have a 
marginal advantage.
adaptive 2 start to have a notable speed advantage at 17 by 17 and more.



Alain

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