Geometry Nodes - Vertex Color Issues #94428
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Reference: blender/blender#94428
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Test Nodes: Vertex Color is set correctly for input geometry
Set Vertex Color does not work after Join Geometry
Set Vertex Color does not work for Mesh Primitives
Wrong color data in Spreadsheet. Correct color is (0.300, 0.500, 0.200) but in spreadsheet (0.301, 0.503, 0.202).
Blender Version: 3.0, 3.1 (27.12.2021 -
20b438d523)OS: Windows 10
Test - GN - Vertex Color.blend
Added subscriber: @gtitaev
Changed status from 'Needs Triage' to: 'Confirmed'
Added subscriber: @redpathn
Removed subscriber: @redpathn
Added subscriber: @JacquesLucke
Haven't checked it in detail, but the issue probably exists because vertex colors are stored as 8 bits-per-channel (see
MLoopCol), while generic color attributes on vertices are 32 bits-per-channel. In some places we have to convert between both representations, and that's a lossy conversion in many cases.Added subscriber: @HooglyBoogly
Changed status from 'Confirmed' to: 'Archived'
Thanks for the report. Part of this is the same as #85962, when joining geometry, the float color type is created rather than the 8-bit byte colors. That situation should have improved after
eae36be372though.The other is the lossy conversion that @JacquesLucke described, which is fundamental to the way the 8-bit colors are stored.
Added subscriber: @alaslipknot
Is there an update on this ? does the current issue means we can't set Vertex colors through GeoNode at all ?
b9799dfb8aand other related changes does improve this situation a fair amount.