Vray Light Material and noise

[oren]

hello
im oren leventar

maybe this is already post here but i want to make sure its not only my problem

simple scene to compare between vray light material and actual plane lights



and the simple scene

https://we.tl/zcsY8PoZ7h

[vlado]

Thanks for the scene, will check it out.

Best regards,
Vlado

[oren]

sorry but i really dont like this answer of chaos group team on my mail :

"Hello Oren Leventar 3d Art,

Thank you for sending us the scene.
If you do a test: replacing the GGX with Blinn in example and the stripped lights with real rectangular ones, the result will be the same. Generally you don't get a clean noise free surface because of the glossiness which V-Ray cleans much slower than the rest of the image, which is an expected behavior. Instead of progressive sampler type which doesn't have so much control you can try using Buket mode and experiment with different values. I found that Min/Max 1/8 and Threshold of 0.01 works fine for this surface.

[vlado]

I'm still looking into it to figure out whether there is something else going on in this case. Sampling of mesh lights can be improved quite a bit, in general.

Best regards,
Vlado

[oren]

vlado
please look at this