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Metal Backend causes UV editing to glitch out, crash Blender #112190

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opened 2023-09-09 23:52:33 +02:00 by Tom Oliver · 12 comments
Tom Oliver commented 2023-09-09 23:52:33 +02:00
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System Information
Operating system: macOS-13.5.2-arm64-arm-64bit 64 Bits
Graphics card: Metal API Apple M1 1.2

Blender Version
Broken: version: 3.5.1, 3.6.3, 4.0 alpha
Worked: (newest version of Blender that worked as expected)

Short description of error
Trying to do UV editing with the Metal backend causes unexpected UI behavior. Islands will glitch out, disappear, randomly stretch and contort, or Blender will crash entirely. It makes Metal useless for work and requires a switch to OpenGL to have expected performance. This happens on my M1 Air, M1 Pro MacBook Pro, and M1 Max Mac Studio. They all had to be switched back to OpenGL.


Exact steps for others to reproduce the error

  • Open the included Blender file with Metal backend
  • Make sure the 3D viewport has either Material Preview or Rendered View enabled.
  • Start UV editing on the Azumi object (go to Object Mode > Select the Azumi object > go to UV Editing Workspace)
  • Zoom, pan, scale, rotate...

It'll happen eventually.

EDIT: This issue seems to stem from having multiple UV Maps on the model somehow. If the additional UV Maps are removed, the issue stops occurring.

EDIT 2: Further digging seems to show that it specifically has to do with the texture atlas expression swapping using the UV Map and Mapping Nodes in the "Colors.001" material. Clearing the field in the UV Map node also immediately resolves the issue.

I've attached two screen recordings of some of the behavior, as well as the error log when Blender crashed, and the file I'm working with.

EDIT 3: Uploaded a simple test file with just a cube using the same material setup as my character file. It exhibits the exact same behavior.

**System Information** Operating system: macOS-13.5.2-arm64-arm-64bit 64 Bits Graphics card: Metal API Apple M1 1.2 **Blender Version** Broken: version: 3.5.1, 3.6.3, 4.0 alpha Worked: (newest version of Blender that worked as expected) **Short description of error** Trying to do UV editing with the Metal backend causes unexpected UI behavior. Islands will glitch out, disappear, randomly stretch and contort, or Blender will crash entirely. It makes Metal useless for work and requires a switch to OpenGL to have expected performance. This happens on my M1 Air, M1 Pro MacBook Pro, and M1 Max Mac Studio. They all had to be switched back to OpenGL. <video src="/attachments/7afa9664-0eda-4c05-ac82-29ef324de2fd" title="error.mov" controls></video> <video src="/attachments/f930dab3-0ad4-4215-adca-c4235f40df94" title="Screen Recording 2023-09-09 at 5.50.49 PM.mov" controls></video> **Exact steps for others to reproduce the error** - Open the included Blender file with Metal backend - Make sure the 3D viewport has either Material Preview or Rendered View enabled. - Start UV editing on the `Azumi` object (go to Object Mode > Select the Azumi object > go to UV Editing Workspace) - Zoom, pan, scale, rotate... It'll happen eventually. EDIT: This issue seems to stem from having multiple UV Maps on the model somehow. If the additional UV Maps are removed, the issue stops occurring. EDIT 2: Further digging seems to show that it specifically has to do with the texture atlas expression swapping using the UV Map and Mapping Nodes in the "Colors.001" material. Clearing the field in the UV Map node also immediately resolves the issue. I've attached two screen recordings of some of the behavior, as well as the error log when Blender crashed, and the file I'm working with. EDIT 3: Uploaded a simple test file with just a cube using the same material setup as my character file. It exhibits the exact same behavior.
Azumi_ARP.blend
67 MiB
crash log.rtf
106 KiB
test_file.blend
1.0 MiB
error.mov
19 MiB
Screen Recording 2023-09-09 at 5.50.49 PM.mov
24 MiB
Tom Oliver added the
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 labels 2023-09-09 23:52:34 +02:00
Pratik Borhade commented 2023-09-11 08:15:36 +02:00
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Hi, thanks for the report. Any improvements in fresh 3.6.3/4.0 build?: https://builder.blender.org/download/daily/
3.5 is now archived

Hi, thanks for the report. Any improvements in fresh 3.6.3/4.0 build?: https://builder.blender.org/download/daily/ 3.5 is now archived
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Tom Oliver commented 2023-09-11 08:16:51 +02:00
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Hey. It still happens in 3.6. Haven't tried 4.0 yet. But I'll give it a shot and get back to you

Hey. It still happens in 3.6. Haven't tried 4.0 yet. But I'll give it a shot and get back to you
Tom Oliver commented 2023-09-11 08:26:17 +02:00
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Yep. Still happens in 4.0. Same glitch and then Blender crashed. Error log is attached.

Couldn't test if OpenGL was still okay since it looks like OpenGL was removed in 4.0, or was at least moved.

Yep. Still happens in 4.0. Same glitch and then Blender crashed. Error log is attached. Couldn't test if OpenGL was still okay since it looks like OpenGL was removed in 4.0, or was at least moved.
error log.rtf
87 KiB
Pratik Borhade commented 2023-09-11 08:35:45 +02:00
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Thanks. @mano-wii , can you verify on Mac M1?
OpenGL support is removed in 4.0 for Mac because some newer feature requires 4.3 GL version :)

Thanks. @mano-wii , can you verify on Mac M1? OpenGL support is removed in 4.0 for Mac because some newer feature requires 4.3 GL version :)
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Germano Cavalcante commented 2023-09-11 16:12:16 +02:00
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Based on the video, I edited the description to include clearer steps.
But I still can't replicate the problem. Whether in Blender 3.5 or Blender 4.0

@tommyoliversays, could you please clarify a few things:

  • Does the problem also happen when textures are not available? (the attached file does not have the textures).
  • Are there any specific actions to perform for the issue to happen?
System Information
  • Operating system: macOS-13.5.1-x86_64-i386-64bit 64 Bits
  • Graphics card: Metal API Apple M1 1.2
Based on the video, I edited the description to include clearer steps. But I still can't replicate the problem. Whether in Blender 3.5 or Blender 4.0 @tommyoliversays, could you please clarify a few things: - Does the problem also happen when textures are not available? (the attached file does not have the textures). - Are there any specific actions to perform for the issue to happen? <details> <summary>System Information</summary> <ul> <li>Operating system: macOS-13.5.1-x86_64-i386-64bit 64 Bits</li> <li>Graphics card: Metal API Apple M1 1.2</li> </ul> </details>
Germano Cavalcante added
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Tom Oliver commented 2023-09-11 16:21:08 +02:00
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Based on the video, I edited the description to include clearer steps.
But I still can't replicate the problem. Whether in Blender 3.5 or Blender 4.0

@tommyoliversays, could you please clarify a few things:

  • Does the problem also happen when textures are not available? (the attached file does not have the textures).
  • Are there any specific actions to perform for the issue happen?
System Information
  • Operating system: macOS-13.5.1-x86_64-i386-64bit 64 Bits
  • Graphics card: Metal API Apple M1 1.2

My apologizes. I thought the textures were packed. I've uploaded the file again with the packed textures.

However, in doing more tests, I've been able to narrow down that the issue only occurs when the 3D viewport in in Material Preview or Rendering Preview. Wireframe and Solid don't seem to have the issue, or at least less frequently that I can't easily reproduce it. I'll edit the description to reflect this as well.

> Based on the video, I edited the description to include clearer steps. > But I still can't replicate the problem. Whether in Blender 3.5 or Blender 4.0 > > @tommyoliversays, could you please clarify a few things: > - Does the problem also happen when textures are not available? (the attached file does not have the textures). > - Are there any specific actions to perform for the issue happen? > > <details> > <summary>System Information</summary> > <ul> > <li>Operating system: macOS-13.5.1-x86_64-i386-64bit 64 Bits</li> > <li>Graphics card: Metal API Apple M1 1.2</li> > </ul> > </details> My apologizes. I thought the textures were packed. I've uploaded the file again with the packed textures. However, in doing more tests, I've been able to narrow down that the issue only occurs when the 3D viewport in in Material Preview or Rendering Preview. Wireframe and Solid don't seem to have the issue, or at least less frequently that I can't easily reproduce it. I'll edit the description to reflect this as well.
Azumi_ARP.blend
67 MiB
Tom Oliver commented 2023-09-11 16:44:04 +02:00
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Okay. More info. It has something to do with the additional UV Maps. If you remove them and just leave the base UV Map, this issue is immediately resolved.

Okay. More info. It has something to do with the additional UV Maps. If you remove them and just leave the base UV Map, this issue is immediately resolved.
Richard Antalik commented 2023-09-11 17:23:20 +02:00
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There are still bunch of textures missing. I wasn't able to reproduce crash on intel Mac, but I was able to reproduce "glitching" as in your second video.
I suspect these are 2 different bugs, so it would be best to split this report and make new one for crash perhaps.

There are still bunch of textures missing. I wasn't able to reproduce crash on intel Mac, but I was able to reproduce "glitching" as in your second video. I suspect these are 2 different bugs, so it would be best to split this report and make new one for crash perhaps.
Germano Cavalcante commented 2023-09-11 17:48:48 +02:00
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I can also confirm the glitch.
I think we can confirm for now because of the glitch.
But the crash actually needs more details.

I can also confirm the glitch. I think we can confirm for now because of the glitch. But the crash actually needs more details.
Tom Oliver commented 2023-09-11 17:59:31 +02:00
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There are still bunch of textures missing. I wasn't able to reproduce crash on intel Mac, but I was able to reproduce "glitching" as in your second video.
I suspect these are 2 different bugs, so it would be best to split this report and make new one for crash perhaps.

I just updated the file again, again making sure to pack the images (as well as try and clear out some redundant materials, been working in this file for a while). It should be good now.

Further messing around seems to show that the UV glitch error specifically has to do with the texture atlas expression swap using the UV Map and Mapping Nodes in the "Colors.001" material. Clearing the field in the UV Map node here also immediately resolves the issue.

> There are still bunch of textures missing. I wasn't able to reproduce crash on intel Mac, but I was able to reproduce "glitching" as in your second video. > I suspect these are 2 different bugs, so it would be best to split this report and make new one for crash perhaps. I just updated the file again, again making sure to pack the images (as well as try and clear out some redundant materials, been working in this file for a while). It should be good now. Further messing around seems to show that the UV glitch error specifically has to do with the texture atlas expression swap using the UV Map and Mapping Nodes in the "Colors.001" material. Clearing the field in the UV Map node here also immediately resolves the issue.
Richard Antalik commented 2023-09-12 17:48:28 +02:00
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@tommyoliversays If you understand the cause of the issue, can you perhaps simplify the file as much as possible?

@tommyoliversays If you understand the cause of the issue, can you perhaps simplify the file as much as possible?
Tom Oliver commented 2023-09-12 18:28:24 +02:00
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@tommyoliversays If you understand the cause of the issue, can you perhaps simplify the file as much as possible?

Sure. Here is a simple file with the same material setup that exhibits the same issue. I'll also add it to the main post.

Edit: also added the texture files separately. I've been packing them but the files sometimes don't work

> @tommyoliversays If you understand the cause of the issue, can you perhaps simplify the file as much as possible? Sure. Here is a simple file with the same material setup that exhibits the same issue. I'll also add it to the main post. _Edit: also added the texture files separately. I've been packing them but the files sometimes don't work_
test_overlay.png
5.3 KiB
test_file.blend
1.0 MiB
1f1d9ff0ef2b4c66e7bcf44d5e12a409.jpg
133 KiB
test_overlay.png 1f1d9ff0ef2b4c66e7bcf44d5e12a409.jpg
Germano Cavalcante added the
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