Blender 3.x: Local object with linked data loses Vertex Groups #94424

New Issue

Alex · 2021-12-28T00:35:06+01:00

Alex commented

2021-12-28 00:35:06 +01:00

System Information
Intel i9-10850K, 32 Gb RAM, NVidia GeForce GTX 1070 8GB
Windows 10 x64

Blender Version
Broken: 3.x
Worked: 2.9x

Short description of error
When you Link something that contains Vertex Groups to a new scene and make that object local while leaving its data either linked or overridden it loses its vertex groups after you reload he file. I have noticed another very peculiar thing – if you link the same object again, vertex groups will magically appear on previous object as well and will stay there until you remove the linked object from the scene. I'm aware about Blender's issues with Vertex Groups but this is different because the same exact thing doesn't happen in 2.9, perhaps this is the result of the refactoring done in https://developer.blender.org/D11689 ?

Exact steps for others to reproduce the error

Open Blender and add a Vertex Group to a Cube, save.
Open another Blender and Link the Cube from the previous file.
Make Cube object Local while its Data should stay linked or overridden.
Save and reload the file and you will see that Vertex Group on the Cube is gone.
Link the Cube again from the previous file and Vertex Group will appear on both Cubes for some reason. If you leave the second Cube in the scene both groups will stay, if you remove the linked Cube the first Cube will lose its groups after reloading as well.

Or:
#94424.zip

extract .zip somewhere
open T94424_main.blend
with the selected Cube: Object > Relations > Make Local > Selected Objects
save and reload the file: vertex groups are gone

**System Information** Intel i9-10850K, 32 Gb RAM, NVidia GeForce GTX 1070 8GB Windows 10 x64 **Blender Version** Broken: 3.x Worked: 2.9x **Short description of error** When you Link something that contains Vertex Groups to a new scene and make that object local while leaving its data either linked or overridden it loses its vertex groups after you reload he file. I have noticed another very peculiar thing – if you link the same object again, vertex groups will magically appear on previous object as well and will stay there until you remove the linked object from the scene. I'm aware about Blender's issues with Vertex Groups but this is different because the same exact thing doesn't happen in 2.9, perhaps this is the result of the refactoring done in https://developer.blender.org/D11689 ? **Exact steps for others to reproduce the error** 1. Open Blender and add a Vertex Group to a Cube, save. 2. Open another Blender and Link the Cube from the previous file. 3. Make Cube object Local while its Data should stay linked or overridden. 4. Save and reload the file and you will see that Vertex Group on the Cube is gone. 5. Link the Cube again from the previous file and Vertex Group will appear on both Cubes for some reason. If you leave the second Cube in the scene both groups will stay, if you remove the linked Cube the first Cube will lose its groups after reloading as well. Or: [#94424.zip](https://archive.blender.org/developer/F12780418/T94424.zip) - extract .zip somewhere - open `T94424_main.blend` - with the selected Cube: `Object` > `Relations` > `Make Local` > `Selected Objects` - save and reload the file: vertex groups are gone

Alex commented

2021-12-28 00:35:06 +01:00

Added subscriber: @SpectreFirst

Pratik Borhade commented

2021-12-29 12:24:22 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-12-29 12:53:33 +01:00

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

Pratik Borhade commented

2021-12-29 12:53:33 +01:00

Hi, thanks for the report. Can not reproduce here on current master and 3.0.0.

I might be missing something to reproduce this issue.

Link the Cube from the previous file.

Link as Object or mesh?

Make Cube object Local while its Data should stay linked or overridden.

Do you mean {nav Object > Relations > Make Local > Selected Object}?

Hi, thanks for the report. Can not reproduce here on current master and 3.0.0. I might be missing something to reproduce this issue. > Link the Cube from the previous file. Link as Object or mesh? > Make Cube object Local while its Data should stay linked or overridden. Do you mean {nav Object > Relations > Make Local > Selected Object}?

Alex commented

2021-12-29 13:15:58 +01:00

Added subscriber: @pratik-2

Alex commented

2021-12-29 13:15:58 +01:00

@PratikPB2123 Aha, I think I know why you cannot reproduce the problem - my Cube was saved in 2.93 and linked to 3.0, when I'm trying to reproduce this on 3.x alone it seems to be working fine so there's something missing between files in 2.9 and 3.0, probably some versioning? Just in case I've tested it again with one Cube from 2.93 and one Cube from 3.0 on the same scene and Cube from 2.93 still loses its groups.

Yes, the testing method is this: Link -> Object ->Cube then Make Local -> Selected Objects

Sorry for addressing the wrong person, my initial quote linked the wrong nickname for some reason.

@PratikPB2123 Aha, I think I know why you cannot reproduce the problem - my Cube was saved in 2.93 and linked to 3.0, when I'm trying to reproduce this on 3.x alone it seems to be working fine so there's something missing between files in 2.9 and 3.0, probably some versioning? Just in case I've tested it again with one Cube from 2.93 and one Cube from 3.0 on the same scene and Cube from 2.93 still loses its groups. Yes, the testing method is this: Link -> Object ->Cube then Make Local -> Selected Objects Sorry for addressing the wrong person, my initial quote linked the wrong nickname for some reason.

Philipp Oeser commented

2021-12-29 13:42:38 +01:00

Added subscribers: @HooglyBoogly, @lichtwerk

Philipp Oeser commented

2021-12-29 13:42:38 +01:00

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

Philipp Oeser commented

2021-12-29 13:42:38 +01:00

Can confirm.

CC @HooglyBoogly

Will dare setting this to High prio since it is a 3.0 regression.
(this might be lowered, but assume this should still be taken care of)

Can confirm. CC @HooglyBoogly Will dare setting this to High prio since it is a 3.0 regression. (this might be lowered, but assume this should still be taken care of)

Pratik Borhade commented

2021-12-29 13:49:56 +01:00

Removed subscriber: @pratik-2

Bastien Montagne commented

2021-12-29 14:34:11 +01:00

Closed as duplicate of #93778

Bastien Montagne closed this issue

2021-12-29 14:34:11 +01:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Blender 3.x: Local object with linked data loses Vertex Groups #94424