Although he will be appearing in Avengers: Age of Ultron as Ulysses Klaw, actor Andy Serkis was serving double duty in the film, bringing other characters to life such the Hulk and the sequel’s big bad, Ultron, Comic Book Movie reports.
Andy Serkis' The Imaginarium works with visual effects companies on motion capture. In a recent interview with Empire Magazine, he provided details on what his work entailed
"We did some work on Ultron. On the development of Ultron before James Spader came on board,” Serkis said. “In terms of movement styles: was he gonna be human-like? was he gonna be robot-like? So we worked with a bunch of different people, from body-popping experts to dancers, to this guy called Neil who's nearly eight feet tall...We gave Mark weights, we had voice projections so he could do his Hulk roar. On screen we could have a virtual representation of the low-res avatar of The Hulk, so he could come out and feel that sense of scale."
Serkis says he's just as happy working behind-the-scenes as he is in front of the camera!
"It's a journey I end up going on with the actors,” he said. “To find out what they want to get out of it, and and what we can do to help them so it's still them authoring the role. Initially when you're asking them to put a grey suit on, they're not very into the idea. But it's usually within the first hour, when they can see the result of them being in that suit [on screen] in real-time, they settle in. And then they've lost themselves in our world. James in particular - he loved every minute of it."
Avengers: Age of Ultron hits theaters May 1, 2015.