Is Darkness a reference for demon Tom? I don’t think I seen the film before.
As for anatomy. Tom is already 12 feet tall, proportionally his head would also be larger, which means a roomier place for the brain. There should be no problem for the brain size in that area.
As for horns and big head, see this creature for a size:
[img=http://www.odditycentral.com/wp-content/uploads/2008/05/bull3.jpg]That is a big horn[/img]
compared to his more normal relatives:
[img=http://upload.wikimedia.org/wikipedia/commons/thumb/0/04/Watusi_Thoiry_1982.jpg/768px-Watusi_Thoiry_1982.jpg]Normal doesn’t mean small[/img]
I’ll take a look at daz3d, though I already heard about it, just doesn’t taken interest in it.
You also had a great point at “Movie Stars” not acting and playing a character. Some just doesn’t play their characters right and just feels fake.