Regression: Vertex Groups not preserved when Join Geometry node is used #100908

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Austin Eberhart · 2022-09-08T11:40:50+02:00

Austin Eberhart commented

2022-09-08 11:40:50 +02:00

System Information
Operating system: Windows 10
Graphics card: RTX 3090ti

Blender Version
Broken: 3.3
Worked: 3.2.2
Caused by 5d67b52441

Short description of error
Vertex groups are no longer preserved or output when a join geometry node is used.

Exact steps for others to reproduce the error
1.) Add a cube
2.) Edit mode and select all
3.) Create new vertex group and assign. Switch to "Weight Paint" mode to see changes
4.) In Geometry Nodes Editor, create a new node tree.
5.) Add "Extrude Mesh" node and connect.
6.) Add "Join Geometry node" and connect
7.) Connect Geometry from Group Input to "Join Geometry" node
8.) In 3.2, the vertex weights transfer as expected. In 3.3, they do not.

I am aware that the geometry nodes modifier can be applied, and the generic attribute can be converted into a vertex group, however, in some cases, applying the modifier is not desirable. The functionality to adjust vertex weights via the "Capture Attribute" node, and "Vertex Weight" modifiers seems to be completely gone as well. Broken 3_3.blend

I have attached a blend file. In 3.2, the vertex weights will be visible. In 3.3, they will not.

**System Information** Operating system: Windows 10 Graphics card: RTX 3090ti **Blender Version** Broken: 3.3 Worked: 3.2.2 Caused by 5d67b52441 **Short description of error** Vertex groups are no longer preserved or output when a join geometry node is used. **Exact steps for others to reproduce the error** 1.) Add a cube 2.) Edit mode and select all 3.) Create new vertex group and assign. Switch to "Weight Paint" mode to see changes 4.) In Geometry Nodes Editor, create a new node tree. 5.) Add "Extrude Mesh" node and connect. 6.) Add "Join Geometry node" and connect 7.) Connect Geometry from Group Input to "Join Geometry" node 8.) In 3.2, the vertex weights transfer as expected. In 3.3, they do not. I am aware that the geometry nodes modifier can be applied, and the generic attribute can be converted into a vertex group, however, in some cases, applying the modifier is not desirable. The functionality to adjust vertex weights via the "Capture Attribute" node, and "Vertex Weight" modifiers seems to be completely gone as well. [Broken 3_3.blend](https://archive.blender.org/developer/F13467698/Broken_3_3.blend) I have attached a blend file. In 3.2, the vertex weights will be visible. In 3.3, they will not.

Austin Eberhart commented

2022-09-08 11:40:50 +02:00

Added subscriber: @austineberhart

Pratik Borhade commented

2022-09-08 12:23:24 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-09-08 15:27:58 +02:00

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

Pratik Borhade commented

2022-09-08 15:27:58 +02:00

Checking when it was changed.

Steffen Dünner commented

2022-09-08 15:29:59 +02:00

Added subscriber: @SteffenD

Pratik Borhade commented

2022-09-08 16:00:47 +02:00

Added subscriber: @JacquesLucke

Pratik Borhade commented

2022-09-08 16:00:47 +02:00

git bisect points me to: 5d67b52441
@JacquesLucke ^
(Reverting above commit does solve the issue)

git bisect points me to: 5d67b52441 @JacquesLucke ^ (Reverting above commit does solve the issue)

Hans Goudey commented

2022-09-08 16:01:13 +02:00

Closed as duplicate of #99197

Hans Goudey closed this issue

2022-09-08 16:01:13 +02:00

Iliya Katushenock commented

2022-09-08 16:01:32 +02:00

Added subscriber: @mod_moder

Iliya Katushenock commented

2022-09-08 16:01:32 +02:00

This comment was removed by @mod_moder

*This comment was removed by @mod_moder*

Pratik Borhade changed title from ~~Vertex Groups not preserved when Join Geometry node is used~~ to Regression: Vertex Groups not preserved when Join Geometry node is used

2022-09-08 16:02:29 +02:00

Pratik Borhade commented

2022-09-08 16:02:29 +02:00

Changed status from 'Duplicate' to: 'Confirmed'

Pratik Borhade reopened this issue

2022-09-08 16:02:29 +02:00

Hans Goudey commented

2022-09-08 16:03:24 +02:00

Added subscriber: @HooglyBoogly

Hans Goudey commented

2022-09-08 16:03:24 +02:00

At this point this is just a known issue/limitation. The join geometry node creates generic attributes which aren't supported by other areas of Blender.
Eventually we may get a way to store generic float attributes sparsely, where we could get the best of both worlds.

At this point this is just a known issue/limitation. The join geometry node creates generic attributes which aren't supported by other areas of Blender. Eventually we may get a way to store generic float attributes sparsely, where we could get the best of both worlds.

Hans Goudey commented

2022-09-08 16:04:12 +02:00

Closed as duplicate of #99197

Hans Goudey closed this issue

2022-09-08 16:04:12 +02:00

Iliya Katushenock commented

2022-09-08 16:06:15 +02:00

In addition:
Perhaps when all the parts of blender move to attributes, then something like this D15896 will render the field correctly, even as a result of nodes, and not just drawing in editing process

In addition: Perhaps when all the parts of blender move to attributes, then something like this [D15896](https://archive.blender.org/developer/D15896) will render the field correctly, even as a result of nodes, and not just drawing in editing process

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Regression: Vertex Groups not preserved when Join Geometry node is used #100908