Blender 3.1 CPU/GPU rendering denoise is broken on M1 Mac / Monterey #96656

New Issue

Jeff Diamond · 2022-03-20T19:10:23+01:00

Jeff Diamond commented

2022-03-20 19:10:23 +01:00

System Information
Operating system: MacOS Monterey (M1 Max)
Graphics card: Integrated GPU

Blender Version 3.1.0 release for M1 Macs
Broken: (example: 2.80, edbf15d3c0, master, 2018-11-28, as found on the splash screen)
Worked: (newest version of Blender that worked as expected) 2.93.3

Short description of error
On all my projects, when rendering via the CPU or GPU, the render works as expected, but on completion the entire screen blacks out to a solid color and the render is LOST! I suspected it must be a post render step, and I have confirmed that it is the DENOISER that is broken in this version of blender. When I go into the scene and remove the denoiser, the render completes, and I can save the image!

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).
You need a project that uses denoising as a final compositing step. Attached is a simple matt object set to denoise at the end. Render it, and at the end you get a gray screen. Go into compositing and remove the denoise node, and you get the render.TestRenderWithDenoise.blend

**System Information** Operating system: MacOS Monterey (M1 Max) Graphics card: Integrated GPU **Blender Version** 3.1.0 release for M1 Macs Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen) Worked: (newest version of Blender that worked as expected) 2.93.3 **Short description of error** On all my projects, when rendering via the CPU or GPU, the render works as expected, but on completion the entire screen blacks out to a solid color and the render is LOST! I suspected it must be a post render step, and I have confirmed that it is the DENOISER that is broken in this version of blender. When I go into the scene and remove the denoiser, the render completes, and I can save the image! **Exact steps for others to reproduce the error** Based on the default startup or an attached .blend file (as simple as possible). You need a project that uses denoising as a final compositing step. Attached is a simple matt object set to denoise at the end. Render it, and at the end you get a gray screen. Go into compositing and remove the denoise node, and you get the render.[TestRenderWithDenoise.blend](https://archive.blender.org/developer/F12937041/TestRenderWithDenoise.blend)

Jeff Diamond commented

2022-03-20 19:10:23 +01:00

Added subscriber: @Jeff-Diamond

Anton Raves commented

2022-03-20 19:11:43 +01:00

Added subscriber: @Memento

Guido commented

2022-03-20 19:28:06 +01:00

Added subscriber: @Nurb2Kea

Guido commented

2022-03-20 19:28:06 +01:00

Plroblem is here...in the users blend file...

Plroblem is here...in the users blend file... ![Screen Shot 2022-03-20 at 7.15.44 pm.jpg](https://archive.blender.org/developer/F12937112/Screen_Shot_2022-03-20_at_7.15.44_pm.jpg)

Jeff Diamond commented

2022-03-20 19:33:10 +01:00

One second - let me check if that is really the issue or if I just screwed up the sample because I keep hooking up / unhooking denoising to test... It would be strange indeed if that was in my original projects yet I never had an issue...

Jeff Diamond commented

2022-03-20 19:41:38 +01:00

OK, I just confirmed that in the original projects I copied over, the image was indeed hooked up to the denoise node...
Stand by for more info.

OK, I just confirmed that in the original projects I copied over, the image was indeed hooked up to the denoise node... Stand by for more info.

Jeff Diamond commented

2022-03-20 19:43:58 +01:00

OK, this looks like a weird MIGRATION issue - it looks like very blender project I bring from 2.93/Intel to 3.1.0/M1Max has that one connection above to the denoiser broken! I'm not sure why this would happen, but at least it's an easy fix.

Jeff Diamond commented

2022-03-20 19:58:38 +01:00

Quick update - it looks like I'm having additional migration issues with loading my 2.93 blend files in 3.1 besides that one broken link to the denoise node involving animation, but I need to take some time and characterize it. But it's safe to say this is now a migration issue and not specifically a denoise issue, unless there's something intentional going on - by that I mean, maybe the reason that single link is breaking is because Blender has an issue with the old denoiser node?

Richard Antalik commented

2022-03-20 20:47:28 +01:00

Added subscriber: @iss

Richard Antalik commented

2022-03-20 20:47:28 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Richard Antalik commented

2022-03-20 20:47:28 +01:00

Seems that noisy image pass is not available unless you enable denoising in cycles properties. Not quite sure if this was intentional and it was decided that nodes won't be re-routed automatically , but I don't see this mentioned in release notes or anywhere else, so will confirm.

As for other issues, please make new report for each new problem.

Seems that noisy image pass is not available unless you enable denoising in cycles properties. Not quite sure if this was intentional and it was decided that nodes won't be re-routed automatically , but I don't see this mentioned in release notes or anywhere else, so will confirm. As for other issues, please make new report for each new problem.

Raimund Klink commented

2022-03-21 17:23:25 +01:00

Added subscriber: @Raimund58

Philipp Oeser removed the

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Blender 3.1 CPU/GPU rendering denoise is broken on M1 Mac / Monterey #96656