Robert Pattinson reveals that a certain part of his costume in The Batman was an absolute pain in the ass to light properly.

Pattinson, who plays the titular caped crusader, revealed in an interview that the issue was so disruptive that it required director Matt Reeves to do multiple takes, which initially worried the high life actor.

“Your first thought is, Oh my God, I’m absolutely terrible,” Pattinson said with a laugh in a recent interview with MovieMaker.

However, after Reeves showed Pattinson the scene read, the star began to realize that the multiple takes were due to a technical issue with the way the light hit his cowl in certain scenes.

Cinematographer Greig Fraser, who was also behind the lens for Rogue One: A Star Wars Story, even remarked to Pattinson at the start of the film that “the two hardest things to light up are Darth Vader’s helmet and cowl.”

Pattinson went on to say that there is a very unique type of body language that you have to learn to adapt to make the mask look perfect.

“If you stare into the light too much, it looks completely ridiculous and you’re wearing a Halloween costume. But if you’re like two millimeters lower, it’s like – oh, it’s completely totemic, and like it looks exactly how it should look. But learning to feel that and learning to react to how the light hits it takes forever,” he said.

Something unique about the Dark Knight’s cowl in the movie is that it’s apparently bulletproof, based on the movie’s later TV spots, but we don’t know if that has anything to do with the lighting problem.

Either way, we’re excited to see just how well Pattinson hides in the shadows when The Batman hits theaters March 4.