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Symmetrize on small objects destroys geometry
Closed, ResolvedPublicBUG


System Information
Operating system: Linux-5.3.0-45-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 560 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116

Blender Version
Broken: version: 2.90 (sub 0), branch: master, commit date: 2020-04-17 20:06, hash: rB0fe8239470ac
Worked: (newest version of Blender that worked as expected)

Short description of error
When I try to symmetrize a small object (smaller then 0.01 unit) operator destroys all vertex near symmertry plane. It creates totally flat mesh if object is smaller then 0.001 unit wide. However, if dyntopo is turned on it works as intended.

Exact steps for others to reproduce the error

  • Add a monkey
  • Apply remesh modifier (0.1m)
  • scale 0.01
  • apply scale
  • go to sculpt mode
  • symmetrize x


  • open attached file
  • symmetrize x