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Multires Unsubdivide freezes Blender with hidden geoemtry #99887

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opened 2022-07-21 12:56:57 +02:00 by Julien Kaspar · 8 comments
Julien Kaspar commented 2022-07-21 12:56:57 +02:00
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System Information
Operating system: Linux-5.15.0-41-generic-x86_64-with-glibc2.35 64 Bits
Graphics card: Quadro GP100/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 510.73.05

Blender Version
Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-07-21 08:18, hash: ee3facd087

Short description of error
In the Multiresolution modifier the buttons "Unsubdivide" and "Rebuild Subdivisions" do a similar operation.
When having any faces in edit/sculpt mode hidden though, using any of these operators will freeze Blender.

Exact steps for others to reproduce the error

  • Subdivide Cube a couple times
  • Apply modifier
  • In edit mode, hide some faces
  • Add multires modifier (Don't add any more subdivisions)
  • Use "Unsubdivide" or "Rebuild Subdivisions"

#99887.blend

**System Information** Operating system: Linux-5.15.0-41-generic-x86_64-with-glibc2.35 64 Bits Graphics card: Quadro GP100/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 510.73.05 **Blender Version** Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-07-21 08:18, hash: `ee3facd087` **Short description of error** In the Multiresolution modifier the buttons "Unsubdivide" and "Rebuild Subdivisions" do a similar operation. When having any faces in edit/sculpt mode hidden though, using any of these operators will freeze Blender. **Exact steps for others to reproduce the error** - Subdivide Cube a couple times - Apply modifier - In edit mode, hide some faces - Add multires modifier (Don't add any more subdivisions) - Use "Unsubdivide" or "Rebuild Subdivisions" [#99887.blend](https://archive.blender.org/developer/F13701692/T99887.blend)
Julien Kaspar commented 2022-07-21 12:56:57 +02:00
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Added subscriber: @JulienKaspar

Added subscriber: @JulienKaspar
Julien Kaspar commented 2022-07-21 13:01:16 +02:00
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Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'
Julien Kaspar commented 2022-07-21 13:02:03 +02:00
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I was able to reproduce this on multiple Linux machines. Not sure when this was introduced. Could be an issue that was there since the feature was added.

I was able to reproduce this on multiple Linux machines. Not sure when this was introduced. Could be an issue that was there since the feature was added.
Julien Kaspar commented 2022-07-21 13:02:51 +02:00
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Added subscriber: @JosephEagar

Added subscriber: @JosephEagar
Julien Kaspar commented 2022-07-21 13:02:51 +02:00
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@JosephEagar Can you take a look at this?

@JosephEagar Can you take a look at this?
Joseph Eagar commented 2022-09-14 08:10:39 +02:00
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Is this still happening? I wasn't able to reproduce it, Hans may have fixed it in his recent hiding patches.

Is this still happening? I wasn't able to reproduce it, Hans may have fixed it in his recent hiding patches.
Julien Kaspar commented 2022-09-14 10:35:41 +02:00
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@JosephEagar Yes I can still reproduce the crash following the steps above.

@JosephEagar Yes I can still reproduce the crash following the steps above.
Philipp Oeser removed the
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Sculpt, Paint & Texture
 label 2023-02-10 09:11:14 +01:00
Raul Fernandez Hernandez self-assigned this 2024-04-23 22:00:58 +02:00
Raul Fernandez Hernandez commented 2024-04-23 22:02:35 +02:00
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Can confirm this still happens, just repro on 4.2 main and MacOS.
Just to be sure: what is the expected result of this operation?
to process the mesh ignoring the edit mode hidden faces?

Can confirm this still happens, just repro on 4.2 main and MacOS. Just to be sure: what is the expected result of this operation? to process the mesh ignoring the edit mode hidden faces?
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Reference: blender/blender#99887
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