GPencil: Low hardness values always draws yellow #80038
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Reference: blender/blender#80038
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System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.67
Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-08-20 18:28, hash:
ce0bcd5fbf
Short description of error
Grease Pencil creates yellow transparency with lower hardness values on brush.
Exact steps for others to reproduce the error
It looks like there's a faint yellow tinge transparency which builds up when putting the grease pencil strokes on top of each other.
What it looks like:
Example blend
yellowtransparency.blend
Basic repro gif
Me shading a ball
Added subscriber: @kfoong
Added subscribers: @fclem, @antoniov
Changed status from 'Needs Triage' to: 'Confirmed'
IIRC this is a limitation in the viewport only, but it's not visible in Render.
@fclem was this related to precission in viewport (z-depth IIRC)?
Grease Pencil always draws yellow with lower hardness valuesto GPencil: Low hardness values always draws yellowViewport:
Render:
Yes limitation of the R11G11B10 format. We could experiment with the R10G10B10A1 format to see if that helps in this case.
I've found a workaround which may be helpful for debugging. The yellow issue disappears when you add a layer with either "Hard Light" or "Subtract". There doesn't need to be anything in these layers:
eg
Hopefully that helps. Antonio's comment made me curious, so I went looking around.
Actually, there is a workaround an it's only visible in the viewport, so we can consider it as Know Issue while we found a better solution.