The 23-year-old actor will be seen taking on the role of vampire Edward Cullen in Eclipse, the third movie in the Twilight Saga, next month when it is released in cinemas.
There is an important tent scene in the flick that stars Pattinson, Kristen Stewart and Taylor Lautner.
The scene took two days to film and another day of reshoots as the director, Chris Weitz, didn't think it was sexy enough.
Asked why it took so long, Pattinson told EW: "[The director] wanted it to be more erotic. Seriously."
Stewart added: "It's true. In the book there's a serious sexual tension. As I'm sleeping, Jacob is staring over my vulnerable body, and he's naked in this f***ing sleeping bag because you heat up faster that way, and Jacob and Edward are leveling with each other."
