Ledger described it as “new technology which is much quicker to apply than regular prosthetics”; he felt he was not wearing any make-up at all.
Two-Face’s disfigurement was created through computer graphics rather than prosthetic make-up, as director Christopher Nolan felt that, no matter how good the make-up was, it is still inherently adding something onto an actor’s face, when Two-Face’s appearance requires part of his face to be burned away.
Aaron Eckhart enjoyed wearing the Two-Face makeup and warned: “When you look at him, you should get sick to your stomach. It’s like you would feel if you met someone whose face had pretty much been ripped off or burned off with acid. There are fans on the Internet who have drawn versions of what they think it looks like, and I can tell you this: They’re thinking small. Chris has gone way farther than people think.”