Baking to vertex colors not working with subdivision surface modifier #86278

New Issue

Simon Thommes · 2021-03-04T16:58:17+01:00

Simon Thommes commented

2021-03-04 16:58:17 +01:00

System Information
Operating system: Linux-5.8.0-7630-generic-x86_64-with-glibc2.32 64 Bits
Graphics card: Quadro RTX 6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.32.03

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-03-03 07:53, hash: a915e47ca1
Looks like this worked prior to 9febda912b

Short description of error
When the object that is baked to vertex colors has a subdiv modifier, the indices get messed up and the wrong loops/corners get the wrong colors.

bake_vertex_colors_subdiv-2021-03-04_16.46.48.mp4

Something for @brecht ?
This is an issue in the 2.92.0 release as well, but I could not find another report, which surprises me... If this is a known limitation, then maybe subdivision should be prevented in this case with a message to the user.

Exact steps for others to reproduce the error
File attached:
bake_vertex_colors.blend

**System Information** Operating system: Linux-5.8.0-7630-generic-x86_64-with-glibc2.32 64 Bits Graphics card: Quadro RTX 6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.32.03 **Blender Version** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-03-03 07:53, hash: `a915e47ca1` Looks like this worked prior to 9febda912b **Short description of error** When the object that is baked to vertex colors has a subdiv modifier, the indices get messed up and the wrong loops/corners get the wrong colors. [bake_vertex_colors_subdiv-2021-03-04_16.46.48.mp4](https://archive.blender.org/developer/F9866280/bake_vertex_colors_subdiv-2021-03-04_16.46.48.mp4) Something for @brecht ? This is an issue in the 2.92.0 release as well, but I could not find another report, which surprises me... If this is a known limitation, then maybe subdivision should be prevented in this case with a message to the user. **Exact steps for others to reproduce the error** File attached: [bake_vertex_colors.blend](https://archive.blender.org/developer/F9866281/bake_vertex_colors.blend)

Simon Thommes commented

2021-03-04 16:58:17 +01:00

Added subscribers: @brecht, @SimonThommes

Philipp Oeser commented

2021-03-04 17:24:49 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-03-04 17:24:49 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser commented

2021-03-04 17:24:49 +01:00

Can confirm, this was not an issue prior to 9febda912b

Can confirm, this was not an issue prior to 9febda912b

Philipp Oeser commented

2021-03-04 17:26:46 +01:00

Asserts here

BLI_assert failed: source/blender/editors/object/object_bake_api.c:1052, bake_targets_output_vertex_colors(), at 'me->totloop == me_split->totloop'

(since this is now initialized with the evaluated mesh)

Asserts here ``` BLI_assert failed: source/blender/editors/object/object_bake_api.c:1052, bake_targets_output_vertex_colors(), at 'me->totloop == me_split->totloop' ``` (since this is now initialized with the evaluated mesh)

blender-admin commented

2021-05-12 23:14:58 +02:00

This issue was referenced by 85be72c1cc

This issue was referenced by 85be72c1cc7317796dcce3ddc6ec2dedd627ff81

Brecht Van Lommel commented

2021-05-17 19:43:13 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Brecht Van Lommel closed this issue

2021-05-17 19:43:13 +02:00

Brecht Van Lommel self-assigned this 2021-05-17 19:43:13 +02:00

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Baking to vertex colors not working with subdivision surface modifier #86278