Applying GN modifier with Capture Attribute node clutters resulting mesh with anonymous attributes #94435
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Reference: blender/blender#94435
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System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 496.76
Blender Version
Broken: version: 3.0.0, branch: SelectThrough (modified), commit date: 2021-12-15 12:21, hash:
6349dd43b1Worked: (newest version of Blender that worked as expected)
Short description of error
When applying a GN modifier which uses a GN node network containing Capture Attribute node(s), the resulting mesh contains anonymous attributes user has not intended to output. This results in ugly clutter user has to clean up themselves.
1,
2,
3,
Exact steps for others to reproduce the error
Result: The resulting mesh contains internal anonymous attributes user has not intended to output
Expected: The resulting mesh contains only the attributes user has intended to output
Added subscriber: @Rawalanche
Added subscriber: @mano-wii
Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'
Not sure if this is really a bug, this captured attribute might still be useful in other cases.
Yes, but in that case, if you have a node tree with let's say 20 captured float attributes, how do you know which one belonged to which node, when they all get assigned generic name with random number? How is that useful?
Added subscriber: @HooglyBoogly
Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'
Yeah, this is a bug, anonymous attributes should be cleared either when evaluation finishes, or when applying the modifier. Not sure which one yet.
Added subscriber: @JacquesLucke
I think it makes sense to remove these attributes in
modifier_apply_obdata.We can't remove them when evaluation finishes, because we may want to keep them around for e.g. viewer nodes.
Added subscriber: @Sophie_Martin
Changed status from 'Confirmed' to: 'Needs User Info'
This comment was removed by @Sophie_Martin
Changed status from 'Needs User Info' to: 'Confirmed'
Added subscriber: @ThomasDinges
This issue was referenced by
4be87e97f4Changed status from 'Confirmed' to: 'Resolved'
@JacquesLucke
This is still broken. It works when the modifier is applied, but it still does not work right when the object is converted to mesh via bpy.ops.object.convert(target='MESH').
Result:
Thanks, please make a new bug report.