Volume Preserving Smoothing takes also into account sharp edges – they will be treated as rails for verts to slide on. This can help to maintain main shapes of smoothed object.
smooth mesh while maintaining main object shape (operator and brush)
border mesh vertices will slide along border edges, this prevents shrinking of mesh outline
smooth brush support pulling/sliding of geometry along surface of mesh
X axis symmetry is supported
works with shape-keys
you have ability to define sliding rail edges (edges marked as sharp) – they constrain sliding of geometry
three edge tension methods (Uniform, Proportional to edge length, Inverse to edge length)
optimized with NUMPY
To make edge into rail edge – just mark edge loop as sharp. Now verts belonging to this edge, will move only along edge.
Update 2.5.2 (12.08.2021)
nicer brush outline for smooth tool
fixed smoothing behavior when brush moved outside of mesh