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Sculpt Changes with Dyntopo Enabled Don't Save
Closed, ResolvedPublicBUG


System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Intel(R) HD Graphics 620 Intel 4.5.0 - Build

Blender Version
Broken: version: 2.83 (sub 5), branch: master, commit date: 2020-03-02 23:59, hash: rBfe7c4fb4a2d5
Worked: (optional)

Short description of error
Changes aren't saved when using Dyntopo. If I make a change to a sculpt with dyntopo enabled, and then save the file, the change isn't saved. If I disable dyntopo, modify using a sculpt tool, and save the file, the changes are saved.

Exact steps for others to reproduce the error
No blend file is necessary.

  1. File>New>Sculpting
  2. Enable Dyntopo
  3. Make a stroke on the surface with any brush.
  4. Save the file
  5. File>Revert (Changes are gone and only the unaltered sphere is there)

Repeat the same process skipping step 2 and the changes are retained in the save file.

Though, I've been using blender for 5 or 6 years, I'm new to sculpting, so I'm not sure when this issue started, or if it's an issue inherent in working with dyntopo.

Event Timeline

System Information
Operating system: Linux-4.15.0-88-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21

Blender Version
Broken: version: 2.83 (sub 5), branch: master, commit date: 2020-03-03 05:53, hash: rB73bd0ef12d98
Worked: (optional)

Same bug.

Jacques Lucke (JacquesLucke) changed the task status from Needs Triage to Confirmed.Mar 3 2020, 11:55 AM
Jacques Lucke (JacquesLucke) changed the subtype of this task from "Report" to "Bug".

I can reproduce the issue.

Unfortunately, there seem to be some memory errors that make it much harder to debug this because it is crashing all the time with ASAN. Will check if I can find the reason.

Philipp Oeser (lichtwerk) triaged this task as High priority.Mar 18 2020, 3:25 PM

This and T74542 seems to have the same roots, bisecting...