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Multires modifier artifacts
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System Information
Operating system: Linux-4.19.49-1-MANJARO-x86_64-with-arch-Manjaro-Linux 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.14

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-03 19:06, hash: rBcc667854a94d
Worked: version: 2.79

Short description of error

In Multires Sculpting when you add subdivisions and when you use Apply Base to sculpts creates artifacts on the mesh all over my work.

Exact steps for others to reproduce the error

  1. Start Blender
  2. Add a multires modifier to the default cube
  3. Enter sculpt mode
  4. Add subdivision 6 to 9 subdivisions
  5. Sculpt
  6. Use apply changes to base mesh
  7. You can see a lot of artifacts in your mesh now.

Watch the steps and result here:

Event Timeline

it happens because you base mesh is way too simple. it also happens in 2.7
I recommend multires modifier for adding details to an already retopo-ed sculpt. like skin bumps.

@Mobin (Weekend) As can you see this is a bug, a duplicated one, if you have the same issue with 2.7x You should report it (I don't have it). Thanks for the recommendation I'm very new sculpting with blender just 13 years doing it.