Oberstein
Gold Member
In the books I think it's just an insignia.
I've heard some adoptions or theories that claim Barad Dur is the actual body of Sauron.
From memory, it seems to me that Sauron can still have a "physical" body - in fact, he tortures Gollum personally. Moreover, it's mentioned that Sauron only has four fingers during the torture scene.
However, I don't mind certain "visual" liberties, given that there's no choice when it comes to adaptation - you have to fill in the blanks.
By the way, Weta did an absolutely remarkable job, and it's a good thing they're going to work on the films. Even if they did give plate armor to the soldiers of Gondor and Tolkien never mentioned it... oh well.