Traditional heat map diffuse skinning algorithm can only deal with watertight meshes, but artists create character components in their own way, then group them together to a character, usually the character is not seamless, this often cause traditional heat map diffuse skinning algorithm to fail.

Voxel heat diffuse skinning algorithm can overcome the shortcoming, it converts the non-seamless character into a solid statue, heat diffuses in the solid statue, so we can get the most natural vertex weights.
————————————
2.79 Version Only