User blog comment:D. Cello/Assassinews 09/23 -- Videos and cinematics/@comment-4473559-20110923211831/@comment-4043223-20110924024817

I think everyone needs to relax a bit. The in game models look the same and the facial differences of Desmond really only apply to the cinematics of the inner world of the Black Room. Bear in mind that Desmond is being protrayed as having gone through immense psychological trauma and is physical a vegetable so it is being protrayed in this way to show his psyche (or more so how his mind projects himself and his surroundings) as well as this disjointed world of the animus operating system. Brent Ashe and Alexandre Breault explained this (in a round about way) in an interview which if I find again I will add the link.