Hi Salty,
Interesting document that I can see offers a design option for front on faces but the problem gets harder when only 3/4 of the face is visible. Plus trying to get the hair to blend smoothly + glasses etc means a significant amount of surface modelling is required, not to mention the cost and training requirement for such advanced design software that can represent a whole face as a parametric object that scales and distorts all associated features, keeping surface continuity and smoothness.
Very interesting project and well worth pursuing.
Cheers,
Tony