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Sculpt : Brush Cursor too jittery even with Default Settings.
Closed, ResolvedPublic

Description

System Information
Operating system: Windows-10-10.0.1709 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30

Blender Version
Broken: version: 2.81 (sub 14), branch: master, commit date: 2019-10-10 16:30, hash: rB91a26ee745f0
Worked: Older Builds.

Short description of error
Latest build of the Cursor Preview is too jittery even with defauly scene wasn't like this in yesterday build even when setting Normal Radius to 0.

Comparisson with old the Sculpt Branch and latest Master Build.

Exact steps for others to reproduce the error
1 . New Sculpt Template.
2 . Load Factory settings.
3 . Move Cursor Preview around the Sphere.
[Based on the default startup or an attached .blend file (as simple as possible)]

Event Timeline

Zino Guerr (Zino) updated the task description. (Show Details)

@Brecht Van Lommel (brecht) This is related to the new TBB scheduler. If you the SCULPT_USE_OPENMP flag check in sculpt_cursor_geometry_info_update and then you disable multithreaded sculpt, it works fine. This is also affecting the area normal and center calculation during sculpting. I think we are missing something in the reduce functions.