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Multiresolution > Apply Base produces garbled meshes #122786

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opened 2024-06-05 18:01:59 +02:00 by Steffen Dünner · 4 comments
Steffen Dünner commented 2024-06-05 18:01:59 +02:00
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System Information
Operating system: Linux-6.5.0-35-generic-x86_64-with-glibc2.35 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 2070 Super/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 555.42.02

Blender Version
Broken: version: 4.3.0 Alpha, branch: main, commit date: 2024-06-05 14:33, hash: 905ceaeacc51
Broken: 4.2
Worked: 4.1.1 Release and previous

Short description of error
Using the "Apply Base" option of the Multiresolution Modifier produces completely garbled meshes.
The same action in 4.1.1 and previous is working flawlessly.

Exact steps for others to reproduce the error

  • Open the attached blend file. It's a simple geometry that was subdivided (in another 3D app) before. BUG_Apply_Base_v01.blend
  • Add a Generate > Multiresolution Modifier to the geometry
  • Click "Unsubdivide" 2 times until it can't unsubdivide no more.
  • Now in the same Modifier click on Shape > Apply Base.
  • In 4.1.x and previous this is the result:
    image
  • In 4.2.x / 4.3.x this:
    image

which looks completely broken.

**System Information** Operating system: Linux-6.5.0-35-generic-x86_64-with-glibc2.35 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 2070 Super/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 555.42.02 **Blender Version** Broken: version: 4.3.0 Alpha, branch: main, commit date: 2024-06-05 14:33, hash: `905ceaeacc51` Broken: 4.2 Worked: 4.1.1 Release and previous **Short description of error** Using the "Apply Base" option of the Multiresolution Modifier produces completely garbled meshes. The same action in 4.1.1 and previous is working flawlessly. **Exact steps for others to reproduce the error** - Open the attached blend file. It's a simple geometry that was subdivided (in another 3D app) before. [BUG_Apply_Base_v01.blend](/attachments/204ce6a8-6e53-4c22-be15-4e38f719a49b) - Add a Generate > Multiresolution Modifier to the geometry - Click "Unsubdivide" 2 times until it can't unsubdivide no more. - Now in the same Modifier click on Shape > Apply Base. - In 4.1.x and previous this is the result: ![image](/attachments/8141b139-bfe1-4385-b84f-4d6d3a6d2da4) - In 4.2.x / 4.3.x this: ![image](/attachments/604c5188-2f9e-41fa-9294-7335e5ca8ff7) which looks completely broken.
BUG_Apply_Base_v01.blend
148 KiB
image.png
331 KiB
image.png
382 KiB
Steffen Dünner added the
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 labels 2024-06-05 18:02:00 +02:00
YimingWu commented 2024-06-06 04:54:20 +02:00
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Can confirm the garbled result.

bisecting...

broken between 8735a8a6be and 95a74a02bc

Can confirm the garbled result. bisecting... broken between 8735a8a6bedf and 95a74a02bcc6
YimingWu added
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 labels 2024-06-06 04:54:52 +02:00
YimingWu commented 2024-06-06 05:57:42 +02:00
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broken by 00e2f55239 cc @farsthary

broken by 00e2f55239d96039db54c9bc3b7d4506ef2f2947 cc @farsthary
Raul Fernandez Hernandez added this to the Sculpt, Paint & Texture project 2024-06-06 17:03:47 +02:00
Raul Fernandez Hernandez self-assigned this 2024-06-06 17:04:00 +02:00
Raul Fernandez Hernandez commented 2024-06-06 17:05:05 +02:00
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Thanks for the bisect!
Investigating...

Thanks for the bisect! Investigating...
Raul Fernandez Hernandez commented 2024-06-06 19:39:15 +02:00
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Have a fix ;)

Have a fix ;)
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 labels 2024-06-07 18:35:44 +02:00
Philipp Oeser added the
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 label 2024-11-15 14:33:57 +01:00
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Reference: blender/blender#122786
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