Crash When Using Alpaca Packer #119210

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opened 2024-03-08 16:01:24 +01:00 by Omar · 5 comments

Omar commented

2024-03-08 16:01:24 +01:00

System Information
Operating system: Linux-6.5.0-15-generic-x86_64-with-glibc2.35 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 525.147.05

Blender Version
Broken: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: 9be62e85b727
Worked: (newest version of Blender that worked as expected)

Short description of error
Blender crashes after trying to pack a 64k mesh.

Exact steps for others to reproduce the error
Open attached .blend file.
Go into edit mode.
Use Pack Islands with just default options.
Blender crashes.

**System Information** Operating system: Linux-6.5.0-15-generic-x86_64-with-glibc2.35 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 525.147.05 **Blender Version** Broken: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: `9be62e85b727` Worked: (newest version of Blender that worked as expected) **Short description of error** Blender crashes after trying to pack a 64k mesh. **Exact steps for others to reproduce the error** Open attached .blend file. Go into edit mode. Use Pack Islands with just default options. Blender crashes.

Crash.blend

957 KiB

Omar added the

labels 2024-03-08 16:01:25 +01:00

Philipp Oeser commented

2024-03-08 16:21:00 +01:00

Member

Can confirm, this is apparently running into n issue where PackIsland::calculate_pivot_ is running into NANs.
Will check.

Can confirm, this is apparently running into n issue where `PackIsland::calculate_pivot_` is running into NANs. Will check.

Philipp Oeser added

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labels 2024-03-08 16:21:23 +01:00

Omar commented

2024-03-08 16:44:23 +01:00

Author

I will also just add in case it is related I was trying to unwrap this little square here and it just would not work until I disabled live unwrap, then smart uv project, then I could unwrap it normally.

I will also just add in case it is related I was trying to unwrap this little square here and it just would not work until I disabled live unwrap, then smart uv project, then I could unwrap it normally. ![image](/attachments/8e2c9e53-eddc-4281-a948-3089e02f556e)

436 KiB

Philipp Oeser commented

2024-03-08 16:57:57 +01:00

Member

There re NANs in the UV maps :

This is also echoed when running C.active_object.data.validate(verbose=True):

ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:1016 mesh_validate_customdata: CustomDataLayer type 49 has some invalid data

The NANs are on face that is located here:

But this means it is more or less a corrupted mesh.
Do you have an idea how this piece was created/generated/modeled?

Usually these corruptions are chased down to the root (instead of guarding every possible tool running into them against this)
Unfortunately unless there are clear instructions on how to reproduce it from scratch we cannot debug this any further.
Things that may cause mesh corruption: Importers, development versions of Blender, modeling tools.

There re NANs in the UV maps : ![image](/attachments/ce613ace-3a84-4778-9357-777570357977) This is also echoed when running `C.active_object.data.validate(verbose=True)`: >ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:1016 mesh_validate_customdata: CustomDataLayer type 49 has some invalid data The NANs are on face that is located here: ![image](/attachments/7b480b7f-7d14-406b-88d8-db7b81b38e5f) But this means it is more or less a corrupted mesh. Do you have an idea how this piece was created/generated/modeled? Usually these corruptions are chased down to the root (instead of guarding every possible tool running into them against this) Unfortunately unless there are clear instructions on how to reproduce it from scratch we cannot debug this any further. Things that may cause mesh corruption: Importers, development versions of Blender, modeling tools.

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labels 2024-03-08 16:59:09 +01:00

Omar commented

2024-03-08 22:00:03 +01:00

Author

Okay I see. I made this mesh in probably blender 3. I did use dreamuv addon's hotspotting feature to generate those uvs though.

Okay I see. I made this mesh in probably blender 3. I did use dreamuv addon's hotspotting feature to generate those uvs though.

Philipp Oeser commented

2024-04-04 09:21:04 +02:00

Member

OK, thx getting back.

Since we have no way to reproduce this with blender's UV tools, there is very little chance of progress here.
The only way to have a fix is finding a way to reproduce (either with blender's UV tools -- then you could open a fresh report for this -- or with the dreamuv addon's hotspotting [in which case this should be reported to the original author(s) of the Addon])

For this report though, I think we have to close.

OK, thx getting back. Since we have no way to reproduce this with blender's UV tools, there is very little chance of progress here. The only way to have a fix is finding a way to reproduce (either with blender's UV tools -- then you could open a fresh report for this -- or with the dreamuv addon's hotspotting [in which case this should be reported to the original author(s) of the Addon]) For this report though, I think we have to close.

Philipp Oeser closed this issue

2024-04-04 09:21:08 +02:00

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labels 2024-04-04 09:21:11 +02:00

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