Stains in denoised rendering

General questions about Indigo, the scene format, rendering etc...
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Torben
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Joined: Mon Nov 21, 2011 3:12 am

Stains in denoised rendering

Post by Torben » Tue Oct 05, 2021 5:10 am

After 9 hours of rendering and denoising, the image has stains. What could be the reason for this?
Unbenannt.png

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pavoda
Posts: 188
Joined: Tue Dec 20, 2016 10:05 am

Re: Stains in denoised rendering

Post by pavoda » Wed Oct 06, 2021 11:56 pm

I pointed this out a few months ago ... nobody cares :oops: https://www.youtube.com/watch?v=PfAZPByEIOY

burnin
Posts: 150
Joined: Tue May 04, 2010 2:53 pm

Re: Stains in denoised rendering

Post by burnin » Thu Oct 07, 2021 12:00 am

To both...

Fireflies - usual suspects.
Check "clamp contribution" to get rid of those & also render faster (less noise).

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pavoda
Posts: 188
Joined: Tue Dec 20, 2016 10:05 am

Re: Stains in denoised rendering

Post by pavoda » Thu Oct 07, 2021 1:09 am

it doesnt works clamp contribution for GPU and denoising...It is a bug.

burnin
Posts: 150
Joined: Tue May 04, 2010 2:53 pm

Re: Stains in denoised rendering

Post by burnin » Thu Oct 07, 2021 4:56 am

Strange, I just checked and there's no such issue...

e.g.
Glass scene (mor4us_may_2017_compo.igs) Path OCL, clamp 10, optimize & denoise, halt @ 5s, GTX1070 & M5000.
Attachments
Glass-IndigoRenderer462.jpg

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pavoda
Posts: 188
Joined: Tue Dec 20, 2016 10:05 am

Re: Stains in denoised rendering

Post by pavoda » Thu Oct 07, 2021 1:07 pm

simple test:

- GPU rendering is on for all renders
- Clamp contribution is checked, Max con=1...for all renders.
- optimise for denoising is off - no farflies, no refraction. Good
- optimise for denoising is on - farflies will appier (clamp contribution no effect yet)
- denoiser is on - blurry spots from farflies
Attachments
indigo scene.pigs
test scene
(28.13 KiB) Downloaded 146 times
indigo_02.PNG
GPU, Max clamp=1, Optimise for denoising on, denoising off
indigo_01.PNG
GPU, Max clamp=1, Optimise for denoising off, denoising off
indigo_03.PNG
GPU, Max clamp=1, Optimise for denoising on, denoising on

burnin
Posts: 150
Joined: Tue May 04, 2010 2:53 pm

Re: Stains in denoised rendering

Post by burnin » Thu Oct 07, 2021 10:10 pm

Oof, I see. Shit had hit the fan :lol:

For sure, clamping is already fundamental part in every engine for past decade (+ some) & must be working, if not than it "renders" ;) OCL (GPUs) unfit for production. Such a thing should be noted & prioritized...

Have you checked, if anything of what is suggested here helps - Why are there bright little specks still in my render?

Another way is to go back to manual work, highpass filtering to remove fireflies then denoising w/ NVidia AI Denoiser (cl) or use other AI enhancement & repair tools

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