Smooth Boolean is a 3ds Max plugin for creating smooth transitions between ProBoolean meshes.

v2.0 Changelog:
-lowpoly meshes handling
-much better dealing with meshes of different resolution
-15-20% faster solving
-sbSmoothBridge modifier to seamlessly bridge 2 open edgeloops with uneven edge count
-sbNormalMap modifier to restore smooth explicit normals on edited SmoothBoolean object
-better strips selection
-easier debugging (showing problematic parts of the mesh, overlapping strips warning, highlighting unselected strips)
-saving & restoring strips settings after reverting to ProBoolean
-modifying strips resolution
-cleaner output mesh
-many bugs fixed

Buy or download free demo here: www.km-3d.com