The actor, who plays the role of villainous dragon Smaug in Peter Jackson's upcoming trilogy, described the experience of filming using motion capture as liberating.
"It's very freeing, once you put the suit on and the sensors," Cumberbatch told Total Film. "I've never felt less encumbered, actually. And you have to be. You have to be free.
"You just have to lose your s**t on a carpeted floor, in a place that looks a little bit like a mundane government building. It was just me as well, with four static cameras and all the sensors. Then the boys at Weta work their magic."
Cumberbatch has previously suggested that his appearance in the first film, The Hobbit: An Unexpected Journey, may be very limited, with his role expanding in the second instalment.
The Hobbit has been selected as this year's Royal Film Performance.
The Hobbit: An Unexpected Journey will be released on December 14. Watch a trailer below:
Photo gallery - The Hobbit: