This video is a high quality training video from The Guerrilla CG Project ( http://www.guerrillacg.org ) a non for profit organisation dedicated to teaching the fundamentals of computer graphics.
The topology or mesh pattern of a model can drastically affect the smoothing of a model. Here Greg Petchkovski demonstrates how to avoid smoothing artifacts. A must watch for anyone modelling with subdivision surfaces.
Author: Greg Petchkovsky
For more information about Computer Graphics and higher quality videos visit The Guerrilla CG Project http://www.guerrillacg.org.