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Maniphest T88905

Geometry Nodes: instanced objects don't respond to Vertex Color information.
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Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1650/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 462.31

Blender Version
Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: rB84da05a8b806
Worked: 2.92, but not as intended

Short description of error
When any Attribute Node is placed after the "point instance", the instances don't respond to the Vertex Color information. They don't lose the information, they just don't respond to it.

Exact steps for others to reproduce the error
When using geometry nodes, after instancing objects with the node "point instance", the instanced objects don't respond to the information saved on Vertex Color's itens. On the spreadsheet, it's possible to see that the information is still there, within the instances, but it doesn't read it or respond to it. I've linked a short video demonstrating it and how it works on Blender 2.92. In either versions, GN isn't able to manipulate Vertex Color information.

bug vertex color.blend845 KBDownload

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Event Timeline

Elias Suzumura (eliassuzumura) created this task.Jun 7 2021, 4:12 AM
Elias Suzumura (eliassuzumura) updated the task description. (Show Details)Jun 7 2021, 4:16 AM
Elias Suzumura (eliassuzumura) added a project: Geometry Nodes.Jun 7 2021, 4:25 AM
Richard Antalik (ISS) changed the task status from Needs Triage to Confirmed.Jun 7 2021, 9:17 AM
Pratik Borhade (PratikPB2123) added a project: Nodes & Physics.Jun 7 2021, 3:49 PM
Jacques Lucke (JacquesLucke) closed this task as a duplicate of T89054: Improve integration of generic attributes.Jun 14 2021, 11:13 AM
Jacques Lucke (JacquesLucke) added a subscriber: Jacques Lucke (JacquesLucke).

The problem is that when the instances are made real by the Attribute node, the vertex color layer is turned into a "generic attribute" that is not yet supported by eevee.

Philipp Oeser (lichtwerk) mentioned this in T90431: Geometry nodes fails to maintain links to vertex colours when converted to regular geometry..Aug 5 2021, 10:54 AM