 The gorilla suits used in movies up to this time had obvious  anatomical differences from real gorillas; for instance, the  wearers real eyes were seen, forcing modification to the face. For  this film director Michael Apted (qv) wanted to use real gorillas  where possible, but some shots would have to use gorilla suits, so  the difference would show. Rick Baker (qv) met the challenge and  created gorilla suits good enough that Apted could do what he  wanted.