Use Delta Mush deformers to filter deformation artifacts and create smoothing effects.
The Delta Mush deformer functions as a low-pass filter to remove deformation artifacts and guide the final result closer to the original rest geometry. It can be useful in many different workflows such as paint free skinning, smoothing of coarse simulation results and shot post corrections.
Joe Mancewicz, Matt L. Derksen, and Cyrus A. Wilson, Delta mush: smoothing deformations while preserving detail, SIGGRAPH 2014, ACM, New York, NY, USA, Article 28, 1 pages.