Interior sampling problem with automatic sampling - still noisy

[Jiri.Matys]

Hi,

I have this problem I cant solve with automatic subdivs. And I dont want to change subdivs on every light and shader manually, its like go back three years. But I cant make it work in automatic mode.

As you can see on the picture (400%) there is still noise. Yes, its 400% crop, but I just wanna to be less noise and I tried everything I can imagine. My setup is BF+LC, and doesnt matter what I set as maximum subdivs and threshold, noise is still there almost with same amount

Weird thing is that sample rate is pretty much blue, but GI and lighting passes is really noisy.

Please can some help me? I dont want to use denoiser. I want to know how to fix this without it.

Thank you.

[Jiri.Matys]

I forgot that Vray Sun+Sky is used.

[^Lele^]

Scene please?
If you post it here (cut down as needed) perhaps i can help directly.
If not, i'm sure Support will be more than happy to oblige.

[vlado]

What are your settings now?

Best regards,
Vlado

[Jiri.Matys]

min-max 1-24 (1-50 looks the same), noise threshold 0,005 (0,003 look more or less the same). When I change both - 1-50 and 0.003, it look better, but still noisy to me for this settings. Automatic BF, LC with 2500 subdivs.

Thank you Vlado.

[^Lele^]

could it be a fine noise on the shader? as bump or mask?
Or a very low, diffuse gloss reflection lit through glass?

[Jiri.Matys]

No, it couldnt. No texture on a shader. And no glass in windows, its just a hole

[^Lele^]

Eh, me, i'd surely need a scene, with the actual render settings, and if it's not the shader, at least the part of scene which recreates the issue.
What does the noiselevel RE looks like? Higher in those areas?

[Jiri.Matys]

Lele, I will send you a scene. Just sent an invitation through linkedin.

[^Lele^]

Lele, I will send you a scene. Just sent an invitation through linkedin.

Accepted. Feel free to use to use my chaosgroup email.

[Jiri.Matys]

Noise is visible everywhere where is not some color texture or something. When its big flat plane, it has noise more then I can accept.

[Jiri.Matys]

Sorry, I am blind probably but I cant see your chaos mail.

[^Lele^]

it's emanuele.lecchi [at] chaosgroup.com

[^Lele^]

Noise is visible everywhere where is not some color texture or something. When its big flat plane, it has noise more then I can accept.

Acceptance is personal, numbers aren't, thankfully.

If you find 0.005 NT is too high for your noise tastes, there is but one simple way to get it cleaner: raise max subdivs, lower NT, and let it render.
Know that half the noise means four times the rendertime.

If, however, the NT is not reached properly in places (hence me asking about the noiseLevel RE looks), it could be that 50 subdivs are too few for the scenario you're rendering, and need to be raised further.

If that still didn't achieve what you'd like to see, then perhaps there is an issue we'd need to have looked at.

[Jiri.Matys]

noiseLevel is completely black, but there is noise for sure. I will send you a scene.