Geodesic Voxel Skinning
Voxel skinning is a smooth skinning method allowing you to isolate specific areas of the mesh and produce quick, high-quality results. Unlike standard skinning, which has no concept of body parts, Voxel skinning uses a voxel representation of the mesh to help calculate influence weights. It computes, then applies, the resulting weights to the existing closed-form skinning method, deforming the character's geometry where you need it and can solve the skin weights even when you are out of bind pose.
3ds Max 2017 enables you to quickly switch between painting and blending weights by simply pressing Shift.