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Mode switching hides vertices in Edit mode (Weight paint / Sculpt mode --> Edit mode)
Closed, ResolvedPublicBUG

Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.92

Blender Version
Broken: version: 2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: rB0330d1af29c0
Worked: 2.83.5
Caused by rB3ebe97c06b67: Fix T78665: Face Set visibility reverted when chaning Multires Levels

Short description of error
Hello,
I think I found a very anoying bug here. with this mesh, as soon I go in weight paint mode, a part of my mesh is locked and become uneditable and you cannot select some vetices of the mesh in edit mode. I tried with the 2.83.5 version and it seems to work as intended with this one. the issue only comes with 2.90.0 here.

here is the .blend file:

Exact steps for others to reproduce the error

  • Open the attached .blend file
  • at this point all vertices are still selectable
  • enter weight paint mode
  • go back to edit mode
  • and here you end with a glitched mesh (vertices dont draw, cannot be selected, alt+ H to makes them visible again)

Exact steps for others to reproduce the error (another symptom: sculptmode to edit mode automatically hide certain vertex)

  • Create a cube,
  • Delete a face,
  • Extrude some vertex,
  • Enter in sculpt mode,
  • Enter in edit mode.
  • Extruded vertex will be hidden (alt+ H to makes them visible again)

I hope someone will find what's going on.

thank you for your time

Event Timeline

Philipp Oeser (lichtwerk) changed the task status from Needs Triage to Confirmed.Mon, Sep 14, 5:44 PM
Philipp Oeser (lichtwerk) triaged this task as High priority.
Philipp Oeser (lichtwerk) changed the subtype of this task from "Report" to "Bug".

Yes!
Thank you Philipp, I managed to fix my problem with this manipulation:

  • go to sculpt mode
  • hit alt-H to unhide everything
  • and then all is back to normal in edit mode

still not sure if it's a bug or a mishandling

Philipp Oeser (lichtwerk) lowered the priority of this task from High to Normal.Mon, Sep 14, 9:19 PM

OK, that is good to here.

I havent investigated this further (and from quick look this doesnt seem to happen every time you hide facesets in sculptmode), so might be something specific to this file.
Will lower the prio.

Philipp Oeser (lichtwerk) renamed this task from Weight paint mode freeze a part of the mesh in Edit mode to Mode switching hides vertices in Edit mode (Weight paint / Sculpt mode --> Edit mode).Tue, Sep 15, 1:06 PM
Philipp Oeser (lichtwerk) triaged this task as High priority.
Philipp Oeser (lichtwerk) updated the task description. (Show Details)

raised prio here again (simpler repro steps were found)