I think they made him look like a cartoon on purpose. you know hollywood has the shit to make it look perfect. I think the movie looks retarded, probably be better if they just had lou do the movie
The copy you downloaded was a bootleg unfinished work in progress hence the shitty special effects. The effects you saw were basically "stage 1" in the whole process, and the movie you saw wasnt edited the way it will be shown to the masses.