3c51029ec7
The issue is the following: - The stabilized normal for the main pass is calculated in `calc_brush_plane` - The normal is (wrongly) recalculated in `update_sculpt_normal`. This is a common problem that other brushes have. The specific issue with the Plane brush is that the recomputed normal is not stabilized. - For symmetry passes, this non-stabilized normal is then assigned to the brush in `calc_brush_plane` This PR fixes the issue by explicitly returning false in `sculpt_brush_needs_normal` when the Plane brush is used. A more proper refactor would be needed, but this can easily be ported to 4.4. Pull Request: https://projects.blender.org/blender/blender/pulls/137271
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