I used to work with NVIDIA Denoiser in Corona Renderer 12 without any issues.
Recently, I upgraded to Corona Renderer 14, and I noticed that after saving the image, I can no longer find the Denoise option that used to be available before in the post tab.
The strange thing is that the image appears clean (denoised) before saving, but when I save it as cxr and reopen it later, the image has noise, and I can’t figure out how to apply the denoising anymore.
In previous versions, I could simply use the Denoise button located below in the post tab, but now the option seems to be missing, or have any changes been made to the UI?
So after finishing my batch rendering cameras, I have to re-render all of them and save manually one by one.
Hope someone can help.
You are referring to Corona Image Editor, right?
Please make sure that you are using Corona 14 Update 1 Hotfix 1 - Download | My Chaos
If it’s not about CIE or you are already using the newest version of Corona, please provide some further information on what exactly you are doing and what is happening. Screenshots would be great.
Yes, you are right, I’m referring to Corona Image Editor
I did update to the most recent version, but still enountering same problem. Let me share this photo with you in the attachment
Note that the Nvidia AI Denoiser is checked, but it’s not active; that happens only after saving the file and open it in Corona Image Editor, not while rendering.
I am attaching a video where I am doing the following:
start CIE > open a CXR file with AI denoising enabled > the effect of denoising is visible in CIE > save as CXR > open the newly saved CXR > the effect of denoising is still visible in CIE
If you are doing something differently, can you please provide step-by-step instructions or a video? Thank you in advance.
When I first open the scene, the denoiser seems works fine, but with wrong lighting, after turn on/off one of the lighting in the lightMix tab, the noise starts to appear and couldn’t denoise it.
The following video I just recorded might explain the problem
In your recording, it looks like the CXR opens without denoising. I can’t see denoising applied to your image at any part of your video.
Was the CXR originally saved with Intel or NVIDIA denoising enabled?
Could you please share with us any CXR where this happens?
When I first open the CXR file, the Denoise works properly. It may not have been visible in the previous video because of the strong lighting, but as soon as you change any of the LightMix values, the Denoise disappears and does not come back again.
I tried testing with another file, and the same problem occurs.
I also tried it on another computer with the same version of Corona installed, and the issue still happens.
Could this be a software bug in the latest update?
I will share a small file so we can try to narrow down the problem.
This is a simple CXR file that you can test to see the issue:
When you open the file, Denoise works fine, but as soon as you change any of the values in LightMix, the Denoise stops working, so I couldn’t save my renders denoised after light adjustment.
Answering your question “Was the CXR originally saved with Intel or NVIDIA denoising enabled?” yes, saved with NVIDIA denoising enabled
Without checking the CXR yet, first question is, is denoising enabled for the LightSelect passes (“Apply denoising also to this render element” at the bottom of the LightSelect settings)? When you open the CXR, it is showing the Beauty pass, but when you change something in LightMix, it swaps to showing the LightMix and not the Beauty - if the LightSelects are not denoised, then the LightMix result can be “undenoised” while the Beauty can be denoised. Could this be what is happening?
This is now reproduced and reported as (Report ID=CMAX-2220).
This only happens with the NVIDIA AI denoiser, so as a workaround you can switch to the Intel denoiser.
Thank you for answering, and yes, denoising is enabled for the LightSelect passes
I tried to check all the possible causes based on my experience before writing this post, and it turned out that there is indeed a real issue with Nvidia Denoiser.
I will try working with the Intel Denoiser until the issue is fixed in the upcoming updates.
Thank you
Thank you for the confirmation! Also, we did confirm that to be the case in our internal testing too. Sorry for the inconvenience, and we are looking into getting the fix done. BTW, the Intel Denoiser is far better, while unfortunate you have been “forced” to try it out, on the flipside it’s an opportunity to test it. I haven’t used the NVIDIA denoiser in years at this point and always use the Intel one (this doesn’t change our priority in fixing the NVIDIA one!) Thanks!
Intel Denoiser might give me better results, but what makes NVIDIA Denoiser special for me is the ability to see the result during rendering, which helps me determine the right time to stop.
I also send screenshots to the client during the render, which is another helpful factor.
But I will try it anyway and let you know the results.
I’ve noticed an issue in the latest release of Corona that seems related to this thread.
When using the batch script to extract images from CXR files, the Nvidia Denoiser fails to work. Interestingly, switching the denoiser to Intel works perfectly fine without any issues.
This has been reported as support ticket #489774 and logged in our internal tracker as CMAX-2391. We are not aware of any solutions/workarounds at this point, sorry.
