Nvidia Denoiser BUG

Corona Corona for 3ds Max Issues
1

Hi!

Unfortunately I found out right now a problem with Nvidia Denoiser in RC5.
Once the image is rendered and saved in CXR format, once opened with the Corona Image Editor the Nvidia denoiser gives me very bad and strange results!
I attached a screenshot to see.

It happens with all the CXR files I have, older ones and new ones.
The latest Nvidia driver is installed and I use a 3080 RTX.

I didn’t mentioned this problem in 3ds Max, when I render in the application the denoiser seems to work well, probably there is a problem withe Corona Image Editor.

Let me know if you confirm the issue.

Thanks,

Dionysios -

Nvidia_Denoiser_Bug.jpg
Nvidia_Denoiser_Bug.jpg956×523 65.4 KB

2

Hi Dionysios, I just tried this with V7 RC5 and I am getting an identical result in the VFB and in CIE.
Could you please provide:

3

Hi Maru,

the problem appeared at my workstation at home and as I’ve mentioned in my initial message, if I open OLD CXR files it happens as well.
In any case, if it can help, I can send you a teapot scene once back at home.

For your info, VFB works perfectly well, CIE is the problem…
Maybe uninstall Corona and install it again could fix the problem? I’ll try that too tonight.

Thanks,

Dionysios -

4

At the office it works perfectly as well.
I’ll try to uninstall and install again at this point, but only tonight once I am back at home.

Thanks,

Dionysios -

5

Hi Maru,

as I promised I did some tests and here are my results:

  • On the second workstation which uses an “old” 1080 I have no issues with RC5 and Nvidia Denoiser.
  • Uninstall and install again didn’t help on my main workstation, 3080 RTX.
  • At the end the problem appears in VFB and CIE ONLY when a high res image is produced, example: 6100px and higher.
  • Low Res images work fine, no issues.

I am going to upload in your Dropbox account a 3ds Max scene (teapot) and a high res CXR file @ 6100px.

Thanks,

Dionysios -

6

Files are upoladed in your Dropbox space, name of the file: Dionysios_Nvidia_Denoiser_Problem.zip

Thanks!

Dionysios -

7

A small update while I work on some of my images:

If I render a 8.500px image in Region mode (the region is quite small) and Nvidia Denoiser is on, the VFB image area flashes every 1 or 2 seconds. It goes to black and turns normal again.

Thanks,

Dionysios -

8

Did you guys had a chance to check what’s going on? Why it produces those artifacts only in high res and no low res? Could be my GFX card?
I have no graphic issues with the card in any application, gaming, or other software.

Thanks again and have a nice weekend!

Dionysios -

9

Hi Dionysios, sorry, we don’t have any new findings yet. We will look into this ASAP.
Sorry that this is taking so long, I will do my best to speed it up.

10

Thanks Maru,

no stress, I am just wondering if is a HW problem or SW one.
Here in the office it doesn’t happen and same thing for my second workstation at home, both have an Nvidia 1080 card installed.
I only see the issue on the workstation where an RTX 3080 card is on.

Thanks!

Dionysios -

11

I was able to reproduce this issue, but only using your CXR file.
I opened your scene and rendered it locally, saved a new CXR file in 6100 resolution and denoised it in CIE - everything was fine.
And I am using “only” a GTX 1660.

So it appears to be some issue on your end. Here is what I would suggest:

In V7, we do not install the specific Optix denoiser with Corona. Instead, we provide the one shipped with NVIDIA drivers, so:

  1. Uninstall Corona completely
  2. Go to C:\Program Files\Corona and remove this whole folder
  3. Make sure you have the latest NVIDIA drivers installed in your system
  4. Go to the folder where you have the V7 RC5 installer and make sure you do not have any offline NVIDIA Denoiser installer in that folder (this: https://coronarenderer.freshdesk.com/support/solutions/articles/12000048131)
  5. Install V7 RC5 again using “custom” installation mode and make sure the NVIDIA Denoiser is selected in the installer
  6. Try rendering the same scene again, save a CXR, try denoising it in CIE
12

Wow, fast result and thanks!
I’ll try your suggestion workaround list tonight once back at home and I’ll let you know.

Thanks a lot for now,

Dionysios -

13

Hi Maru,

Unfortunately no luck.

  1. I uninstall Corona V7 RC5
  2. After this didn’t find any Corona folder in C:\Program Files\
  3. Reinstall Nvidia latest drivers
  4. Reinstall Corona V7 RC5
  5. Denoiser works fine in low res but produces those strange artifacts in high-res.

I am sorry for that…

Dionysios -

14

Hi Dionysios,

Could you try and roll back to a previous driver version and see if that helps?

Cheers,

Rowan

15

Yes, I found the problem!

The issue is produced with the latest Nvidia Driver 471.11.
Resolved if I install the previous one 466.77, so it is the Nvidia latest driver responsible for the artifacts!

Thanks!

Dionysios -

16

And for your info I confirm, my second workstation who uses a 1080 with those latest drivers, doesn’t produce this problem, the 3080 RTX yes.

So issue resolved if the Nvidia Driver 471.11 IS NOT installed on the system.

17

Hi all.

Just a reminder, is Nvidia aware of the Denoiser issues with it’s new driver releases?
For now only the 466.77 works as it should.

Thanks,

Dionysios -

18

Hi Dionysios,

Sorry for not giving any updates on this, I contacted Nvidia today and I will let you know when I have some more information.

Cheers,

Rowan

19

Thanks you Rowan!

Take care,

Dionysios -

20

HI, just an update…

Installed last Nvidia drivers + last daily build and the bug is still here.
Probably they didn’t work on it yet.

Thanks,

Dionysios -