Geometry of external objects loses its attributes after subdivision #85691
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Reference: blender/blender#85691
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Geometry that is referenced in the node tree via Object Info or Collection info node loses its attribute information if there is a subdivision surface modifier on the object.
Doing the subdivision in the nodetree itself results not in the complete loss but in artifacts, as newly generated vertices seem get initialized with 0 instead of interpolated.
(This is a separate issue, addressed in #85697)
subdiv_attribute_lost-2021-02-16_11.53.40.mp4
subdiv_attribute_lost.blend
Changed status from 'Needs Triage' to: 'Confirmed'
Added subscriber: @SimonThommes
#87441 was marked as duplicate of this issue
Attributes of external objects lose their attributes after subdivisionto Geometry of external objects loses its attributes after subdivisionAdded subscriber: @eyecandy
Added subscribers: @Ace_Dragon, @mano-wii
Added subscriber: @JacquesLucke
Turns out,
3e87d8a431
already "fixed" it for vertex groups with the change inobject_update.c
. Looks like they went for the dirty route of never automatically deleting vertex groups automatically. I guess the main case where this would be bad is when there is a character with a larger number of vertex groups which is subdivided after the armature modifier.Given that this is fixed for vertex groups now, the other task I merged is not actually a duplicate anymore. I wonder if the real solution would be to never delete custom data layers by default and to leave this as a responsibility for the artist for scene optimization.
This issue was referenced by
382b06c80c
Changed status from 'Confirmed' to: 'Resolved'