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Script which exports meshes also affects certain meshes #122058

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opened 2024-05-21 18:47:00 +02:00 by Robert S · 6 comments
Robert S commented 2024-05-21 18:47:00 +02:00
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System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 552.12

Blender Version
Broken: version: version: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: e1743a0317bc
Worked: (newest version of Blender that worked as expected)

Short description of error
image
image

Exact steps for others to reproduce the error
Export the model to GLB.

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 552.12 **Blender Version** Broken: version: version: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: `e1743a0317bc` Worked: (newest version of Blender that worked as expected) **Short description of error** ![image](/attachments/c060cb61-1367-4bc4-9356-e531e9b81384) ![image](/attachments/97c42790-1b56-427c-a338-356a20c0717e) **Exact steps for others to reproduce the error** Export the model to GLB.
image.png
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export-py-issue.blend
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image.png
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Philipp Oeser commented 2024-05-22 08:06:17 +02:00
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For me, this happens with the regular glTF exporter as well, no?

Just getting this straight: this has nothing to do with your particular script, does it?

For me, this happens with the regular glTF exporter as well, no? Just getting this straight: this has nothing to do with your particular script, does it?
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Robert S commented 2024-05-22 10:57:39 +02:00
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Oh, yes you are correct. I just assumed it was the script since I modified that. Updated the bug report now, and I have more examples if needed, turns out.

Oh, yes you are correct. I just assumed it was the script since I modified that. Updated the bug report now, and I have more examples if needed, turns out.
Philipp Oeser commented 2024-05-22 12:32:18 +02:00
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OK, to be precise, could you report this https://github.com/KhronosGroup/glTF-Blender-IO/issues/ then? (this is usually where GLTF stuff is handled).

You can also use the Report a Bug in the Addons / Extension.

Will close this already since this is not for the blender/blender repository.

Will already raise awareness to @JulienDuroure though

OK, to be precise, could you report this https://github.com/KhronosGroup/glTF-Blender-IO/issues/ then? (this is usually where GLTF stuff is handled). You can also use the `Report a Bug` in the Addons / Extension. Will close this already since this is not for the `blender/blender` repository. Will already raise awareness to @JulienDuroure though
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Julien Duroure commented 2024-05-22 12:38:35 +02:00
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@lichtwerk This is not something related to glTF exporter.
The mesh is not valid, so exporter can't guarantee how it will be exported, and glTF exporter has no impact on how Blender will manage the geometry when calling object.data.validate()

@lichtwerk This is not something related to glTF exporter. The mesh is not valid, so exporter can't guarantee how it will be exported, and glTF exporter has no impact on how Blender will manage the geometry when calling object.data.validate()
Philipp Oeser commented 2024-05-22 12:50:10 +02:00
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Ah, OK (should have checked, sorry).

ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:655 BKE_mesh_validate_arrays: 	Faces 40 and 17 use same vertices (1
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 2
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 21
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:659 BKE_mesh_validate_arrays: ), considering face 17 as invalid.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:655 BKE_mesh_validate_arrays: 	Faces 9 and 44 use same vertices (16
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 17
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 37
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:659 BKE_mesh_validate_arrays: ), considering face 44 as invalid.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:655 BKE_mesh_validate_arrays: 	Faces 46 and 35 use same vertices (34
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 35
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 53
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:659 BKE_mesh_validate_arrays: ), considering face 35 as invalid.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 67 is unused.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 68 is unused.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 69 is unused.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 140 is unused.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 141 is unused.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 142 is unused.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 178 is unused.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 179 is unused.
ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: 	Corner 180 is unused.

@RobertS : how was this mesh created? Importer? Script? Blender modeling tools?

Ah, OK (should have checked, sorry). ``` ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:655 BKE_mesh_validate_arrays: Faces 40 and 17 use same vertices (1 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 2 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 21 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:659 BKE_mesh_validate_arrays: ), considering face 17 as invalid. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:655 BKE_mesh_validate_arrays: Faces 9 and 44 use same vertices (16 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 17 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 37 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:659 BKE_mesh_validate_arrays: ), considering face 44 as invalid. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:655 BKE_mesh_validate_arrays: Faces 46 and 35 use same vertices (34 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 35 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:657 BKE_mesh_validate_arrays: , 53 ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:659 BKE_mesh_validate_arrays: ), considering face 35 as invalid. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 67 is unused. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 68 is unused. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 69 is unused. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 140 is unused. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 141 is unused. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 142 is unused. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 178 is unused. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 179 is unused. ERROR (bke.mesh): source/blender/blenkernel/intern/mesh_validate.cc:699 BKE_mesh_validate_arrays: Corner 180 is unused. ``` @RobertS : how was this mesh created? Importer? Script? Blender modeling tools?
Robert S commented 2024-05-22 16:55:58 +02:00
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It was made in Blender. Here's the "original" mesh, which doesn't deform on export. The only difference is that I used snapping to straighten it out, and possibly also baked some vertex attributes (been a few years so I can't remember exactly... invalid mesh comes from a 2022 file, while the valid mesh comes from a 2021 file).

Can't fathom why that process could produce something "invalid" (and why Blender doesn't say this in a noticeable way when it happens).

It was made in Blender. Here's the "original" mesh, which doesn't deform on export. The only difference is that I used snapping to straighten it out, and possibly also baked some vertex attributes (been a few years so I can't remember exactly... invalid mesh comes from a 2022 file, while the valid mesh comes from a 2021 file). Can't fathom why that process could produce something "invalid" (and why Blender doesn't say this in a noticeable way when it happens).
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