### Summary 
This paper introduces a system for improving skeletal models to more accurately fit given example skins by automatically adding joints where necessary.

### Problem 
Skinning a character using linear blending can lead to several undesirable artifacts such as the "candy wrapper" effect and other differences from reference data (the example given in the paper was a bulging bicep)

### Methods Used 
* The existing skeletal model is augmented with additional joints between each joint and its parent and children
* The influence sets and parameters of each joint are resolved automatically using a least-squares fitting algorithm
* Normals are included in the least-squares function, and their influence may be increased by the user

### Key Ideas 
Using given examples to generate skeletal data, rather than vice versa
The addition of extra joints to model the output more exactly
The automatic joint parameter solver described in the paper