Low discrepancy triangle light sampling

[alpistinho]

I have implemented a new technique for sampling triangles that should provide better results on them.

This is based (copied) in https://pharr.org/matt/blog/2019/02/27/ ... ing-1.html

The improvement should be most visible in scenes dominated by direct light.

Please give it a spin and keep a close eye for any issues

At 4 samples/pixel:

before:

after:

At 16 samples/pixel:

before:

after:

[happyboy]

Please give it a spin and keep a close eye for any issues

The improvement is obvious! Thanks!

[Sharlybg]

This is going to make product viz a lot faster. Thanks.

[epilectrolytics]

Thanks for this very welcome improvement!

[Sharlybg]

It is activated by default or something special is needed in blendluxcore for that one ?

[alpistinho]

It is activated by default or something special is needed in blendluxcore for that one ?

It replaces the old code, so nothing is needed.

I don't think the difference is that big outside a few specific cases, so you might not be able to promptly see the difference.