Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: Noah45 on 2017-05-22, 15:30:25

Title: LightMix, Denoising and "Rest" category
Post by: Noah45 on 2017-05-22, 15:30:25

Not sure if this is bug. LightMix render element occasionally will not Denoise, all other parameters being the same.

1.6 DB April 24 2017, Max 2018

Title: Re: LightMix Denoise Hit or Miss
Post by: maru on 2017-05-22, 17:24:19

Aren't you running out of RAM?

Title: Re: LightMix Denoise Hit or Miss
Post by: Noah45 on 2017-05-23, 01:27:13

Keeps me eye on the 64GB ram...so nope

Title: Re: LightMix Denoise Hit or Miss
Post by: Noah45 on 2017-05-23, 15:57:47

Although after stripping the scene down, LightMix consistently denoises. So, This is a fairly simple scene rendered at 4K, and 64GB isn't enough Ram?

or is there a way to 'denoise only' LightMix but not individual lightselect render elements?

Title: Re: LightMix Denoise Hit or Miss
Post by: Noah45 on 2017-05-24, 01:07:35

Bit of disappointment, eliminated unnecessarily CoronaLightXX  render elements. And still NO DENOISE? w/ 64GB and a lightweight scene...

Can anyone help with this problem?

Title: Re: LightMix Denoise Hit or Miss
Post by: maru on 2017-05-24, 09:11:43

Sorry for the delayed communication.
I have replied to your support ticket. Once we know what was causing the troubles, we will share the solution here too.

Title: Re: LightMix Denoise Hit or Miss
Post by: maru on 2017-05-24, 19:58:33

So it seems that the solutions would be:
1) Optimizing RAM usage - https://coronarenderer.freshdesk.com/support/solutions/articles/12000023310
2) Rendering the image with no denoising, only with "gather data for later" denoising option, and performing the actual denoising in Corona Image Editor.

Title: Re: LightMix Denoise Hit or Miss
Post by: sprayer on 2017-05-25, 13:06:05

Disabling VFB during rendering will save RAM too

Title: Re: LightMix Denoise Hit or Miss
Post by: maru on 2017-05-25, 15:33:47

Quote from: sprayer on 2017-05-25, 13:06:05

Disabling VFB during rendering will save RAM too

Yup, but probably not much. It's also listed in this guide: https://coronarenderer.freshdesk.com/support/solutions/articles/5000675854

Title: Re: LightMix Denoise Hit or Miss
Post by: Noah45 on 2017-05-27, 00:43:34

Turns out the 'Setup Interactive LightMix' defined some lights as 'Rest' so they were 'unassigned', meaning no DeNoising. Those were mixed w/ DeNoised elements and combined in LightMix appearing 'noisey'. CIE or VFB

The Real Culprit, CoronaLiightMtl is hard to resolve.

Title: Re: LightMix, Denoising and "Rest" category
Post by: maru on 2017-05-31, 10:09:30

I can confirm this behavior, which I think is currently by design. The "Rest (unassigned)" LightMix element will not get denoised when using the LightMix.
I have reported this on Mantis, but I think we can leave this thread here as it is not in bug reporting section, and it may be helpful for other users.

Currently one workaround for this is using the ">Scene" button in LightMix to bake all changes into the scene, and then just denoise the beauty element.