Mesh Deform Backward Compatibility 2.7 --> 3.0 Rig Tessellation #87998

New Issue

Predrag Lazic · 2021-05-03T02:06:48+02:00

Predrag Lazic commented

2021-05-03 02:06:48 +02:00

System Information
Operating system: Linux-5.10.15-1-MANJARO-x86_64-with-glibc2.33 64 Bits
Graphics card: AMD TURKS (DRM 2.50.0 / 5.10.15-1-MANJARO, LLVM 11.0.1) X.Org 3.3 (Core Profile) Mesa 20.3.4

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-05-02 20:40, hash: 5ffab01930
Worked: 2.79, commit date: 2019-06-27 'e045fe53f1b0'

Short description of error
The mesh deform modifier creates an artefact when transferring over a 2.7 rig file.
As in the mesh object becomes a distorted, twisted, pointy thing.
Additional error is that binding level needs to be higher in order to deform correct.

Exact steps for others to reproduce the error

Open attached file or
In blender 2.79 add a subdivision modifier (level 1) to the Cube
Add an object (eg Suzane) and scale to be inside the Cube
To the new object, add the MeshDeform modifier and bind to the Cube
Save and close the file to open in a newer version of Blender

To fix issue unbind mesh deform modifier from mesh object and rebind.
This same error occurred to 'Nathan Rig' when moving from blender 2.49 to 2.5
versioning_subdiv_and_meshdeform_bug_279.blend

**System Information** Operating system: Linux-5.10.15-1-MANJARO-x86_64-with-glibc2.33 64 Bits Graphics card: AMD TURKS (DRM 2.50.0 / 5.10.15-1-MANJARO, LLVM 11.0.1) X.Org 3.3 (Core Profile) Mesa 20.3.4 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-05-02 20:40, hash: `5ffab01930` Worked: 2.79, commit date: 2019-06-27 'e045fe53f1b0' **Short description of error** The mesh deform modifier creates an artefact when transferring over a 2.7 rig file. As in the mesh object becomes a distorted, twisted, pointy thing. Additional error is that binding level needs to be higher in order to deform correct. **Exact steps for others to reproduce the error** - Open attached file or - In blender 2.79 add a subdivision modifier (level 1) to the Cube - Add an object (eg Suzane) and scale to be inside the Cube - To the new object, add the `MeshDeform` modifier and bind to the `Cube` - Save and close the file to open in a newer version of Blender To fix issue unbind mesh deform modifier from mesh object and rebind. This same error occurred to ['Nathan Rig' ](https://www.blendswap.com/blend/2175) when moving from blender 2.49 to 2.5 [versioning_subdiv_and_meshdeform_bug_279.blend](https://archive.blender.org/developer/F12868677/versioning_subdiv_and_meshdeform_bug_279.blend)

Predrag Lazic commented

2021-05-03 02:06:48 +02:00

Added subscriber: @particl3s

Omar Emara commented

2022-02-10 15:46:31 +01:00

Added subscriber: @OmarEmaraDev

Omar Emara commented

2022-02-10 15:46:31 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Omar Emara commented

2022-02-10 15:46:31 +01:00

Can you try to identify the exact versions where it broke? You can find a list of versions here: https://download.blender.org/release/.

Predrag Lazic commented

2022-02-14 22:36:05 +01:00

The hash is e045fe54f1b0

Omar Emara commented

2022-02-15 07:35:44 +01:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Germano Cavalcante commented

2022-02-15 19:32:45 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-02-15 19:32:45 +01:00

I can confirm. The problem is related to the subdivision modifier. It's not a recent regression. The same problem can be seen when opening a file saved in 2.79 in Blender 2.80.
I'll edit the description to indicate the minimum steps needed.

I can confirm. The problem is related to the subdivision modifier. It's not a recent regression. The same problem can be seen when opening a file saved in 2.79 in Blender 2.80. I'll edit the description to indicate the minimum steps needed.

Germano Cavalcante commented

2022-02-15 19:43:16 +01:00

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

Germano Cavalcante commented

2022-02-15 19:43:16 +01:00

I edited the description and also replaced the file with a more simplified one.
The previous one was this:
mesh_deform_2.7--_2.8.blend

I edited the description and also replaced the file with a more simplified one. The previous one was this: [mesh_deform_2.7--_2.8.blend](https://archive.blender.org/developer/F10050469/mesh_deform_2.7--_2.8.blend)

Philipp Oeser removed the

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Mesh Deform Backward Compatibility 2.7 --> 3.0 Rig Tessellation #87998