I have done experiments that indicate a replacement head with very soft forms and mapped planar can take a frontal photo and look good from frontal to three quarter and sometimes even profile. I do not have the skill to model a form like this with an opening mouth but using magnets I have gotten a range of expressions... a real morphing mouth and closing eyes are well possible but I can't make them. If you can find that spidy mask where ever it is and magnet down the chin you will see what I am talking about... the key is a form pretty much like someone with a nylon stocking pulled over their head, very smoothed out but without UV distortion, the texture on the planar mapping really fools the eye. Above is an example I did up in about four or five minutes.