Sin City: A Dame to Kill For was a unique type of effort for star Josh Brolin. As seen on his Sin City: A Dame to Kill For character poster, one of his lines is “Never let the monster out.”

“As an actor doing it for 30 years, every movie you’re trying to figure out a way to make it more naturalistic and more organic to humanity,” Brolin told Movie Fanatic.

“You have lines like, ‘Never let the monster out,’ and stuff like that, and it’s hard. You have to find a cadence. The cadence doesn’t come to you. It’s the kind of movie where you have to dive into. You can’t really manipulate the movie. You can’t manipulate Frank Miller’s mind."

As teased in the Sin City: A Dame to Kill For trailer, Brolin is our male lead and he is under the sensual influence of the title lady, played by Eva Green. A whole lot happens to our anti-hero, and the chance to not only inhabit a Miller graphic novel on the big screen (what are the 17 best graphic novel made movies?), but also to explore the creative genius mind of director Robert Rodriguez had Brolin thanking his lucky stars.

“It’s one of those things that I would go and see a few times if I weren’t in it. Because I’m in it, it would seem pretentious, so I don’t,” Brolin said and laughed.

“The opportunity to be able to do [the movie] was really unnerving. But when I watched it, it was one of the few movies that I have done that I thought, ‘Thank God I’m in this movie.’ I really feel proud to be in this movie. I think it’s just next level. It’s really dark. It’s a lot of fun. It’s very sexy.”

As a fan of the first film -- that you can see when you watch Sin City online -- Brolin assumed he knew what he was in for on the Rodriguez set. It added up to something entirely different. And it was something he wasn't used to.

“You think it is Sin City, you come in and Robert usually shoots you up a week or two, you kind of lend yourself, you dive into this green [screen] world. You don’t know how it is going to be until you actually see the movie,” Brolin said.

Brolin adored the work that Rodriguez and Miller did with the first film, but “this is just a different level to what you did in the last one. I loved you in the last one, but I loved you in this one.”

Speaking of love, Brolin is no stranger to filming sex scenes. But, tackling one in Sin City: A Dame to Kill For with Eva Green with nothing but a green screen surrounding them had to be a whole new level of weird.

“It was unnerving, but you get in there and you do your best. You try to be fearless. You have no idea, especially with green screen. You have no idea what movie you're doing. You really don't. Then, when you see the movie, you're like, 'Oh my God! I'm on a cliff right now!' or 'I'm having sex right now! I thought I was dancing!'” Brolin said and laughed.

However people respond to Sin City: A Dame to Kill For, Brolin will hold his head high. And he thinks that everyone in the cast -- from Joseph Gordon-Levitt, Jessica Alba, Rosario Dawson and Powers Boothe to Mickey Rourke -- should look back and believe that they accomplished something truly extraordinary.

“You see the movie and you see how beautiful it truly is. Whether it's artistic or not, it's truly beautiful and it's truly unique,” Brolin admitted. “That's when, as an actor, it's the best feeling in the world. Whether people see it or not, we'll be able to look back on this and say, 'That was great! That was really great to be involved in.'”

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