System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: AMD Radeon R7 200 Series ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.2 26.20.15029.27017
Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-04 15:31, hash: rB464aaf27016f
Worked: (newest version of Blender that worked as expected)
Short description of error
Surface smooth brush produces artifacts if set to high strength, 0 shape preservation and 0 per vertex displacement when used on the very edges of a dense mesh i.e not at dead center or head on.
Exact steps for others to reproduce the error
- Apply subdivision surface modifier set to level 5 Catmull-Clark on the default cube
- Switch to sculpt mode
- Switch to Smooth brush and switch deformation from 'Laplacian' to 'Surface'
- Set brush strength to 1 and set both 'Shape preservation' and 'Per vertex displacement' to 0
- Use brush, 'edge on' i.e not at the center, in orthographic 'Front' view this translates to using the brush the furthest away on the X-axis from the world origin while still being on the mesh.
I have had much more success in reproducing this bug by using brush on the left and right side of the mesh (+ or - X) as opposed to up and down (+ or - Z). In the file linked below i have already set everything up, to reproduce the bug you just have to use the brush at the right place.
