Draw Face Set brush bug (fixed in 3.4, only relevant for 3.3. LTS) #90743
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Reference: blender/blender#90743
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System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 950M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40
Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-31 18:26, hash:
17243337d7Short description of error
Draw Face Set brush doesn't work properly and select faces randomly
DjHiCdF9fE.mp4
Added subscriber: @cheteron
#86995 was marked as duplicate of this issue
Added subscriber: @PabloDobarro
Changed status from 'Needs Triage' to: 'Needs User Info'
We need a blend file in order to investigate the issue.
Just by looking at the video, a possible cause may be that you have Face Set boundary automasking enabled. As you paint new Face Sets, the Face Set boundaries change and new faces are filtered by the automasking system. Try to disable that option in the general automasking settings.
This comment was removed by @cheteron
I find problem: Faceset boundary
pKa2Ly2M6l.mp4
Changed status from 'Needs User Info' to: 'Confirmed'
I'll keep this as a know issue because even if the behaviour does not make much sense in most of the cases, it is consistent with how the automasking system works. An easy way to fix it would be to add an exception in the automasking system to ignore that option when this brush is being used.
Added subscriber: @PratikPB2123
Added subscriber: @JulienKaspar
While this is tagged as a known issue, the solution seems to be quite simple. I don't know why this was left as it is.
This can be fixed at any point by the suggested change:
Added subscribers: @Vyach, @Ethan-Hall, @fjg3d, @lichtwerk
I could not repro the bug in a recent version such as Blender 4.1
Also can't reproduce using the blend files and steps provided in this duplicated report
#86995
Before closing the bug as resolved I would like for others to attempt to repro and confirm
is fixed.
This is fixed in 3.4 onwards but persists in 3.3LTS.
Possibly the refactor of auto-masking options by Joseph Eagar fixed this.
Will set back to confirmed then and marks as a 3.3 LTS issue only
Draw Face Set brush bugto Draw Face Set brush bug (fixed in 3.4, only relevant for 3.3. LTS)