This introduces two changes:
- Plane offset was shown in the UI as a distance, but it was implemented
as a factor of the brush radius. Now it is a factor in the UI.
- Some brushes had a base plane offset factor hardcoded (all the clay
brushes) and the plane offset was added on top. Now this fixed offset is
exposed in the UI as Plane Base for both clay and flatten brushes. With
this change, the base strength and sensibility of the clay brushes is
way more configurable.
Fix previous commit