Area light distribution

[Srek]

That near to the lightsource the angle between it and the lit surface is near 90° so not many photons will reach that area. At exactly 90° no photons will reache the surface. It's a sideeffect of the lightsource beeing perfectly flat.
Cheers
Björn

[deepshade]

Based on that analogy...
..tilting the light should solve the problem - but it doesn't

I think it's more like a distribution problem near the light?

[Srek]

Sample distribution will add to the problem. More samples should make the edge less prominent.

[deepshade]

Do you think something could be done to improve the distribution at close proximity?

[Srek]

Not without compromising over all light distribution and not without increasing rendertime.

[ilay]

Björn, thanks for reply. Strange, several render engines like fR or vray have not such side-effect.

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