These are the slides I used for a presentation on how I build my fursuit masks. It is meant to be a starting point for someone interested in building these kinds of realistic masks. It covers all materials and steps, though its not "complete" HowTo.
Never thought about uploading it here, though I'm pretty sure there are people here who will find this information quite interesting. I gathered most of this information from different sources, though Clockworks Creature (Qarrezel on DA) was by far my biggest source.