British actor Mackenzie Crook struggled throughout filming for the new Tintin movie because he found the motion-capture method of shooting "frustrating".
The Pirates of the Caribbean star plays a smuggler in Steven Spielberg's 3D The Adventures of Tintin: Secret of the Unicorn - but Crook admits he's unimpressed with the use of certain technologies on set.
He tells Britain's Independent on Sunday, "I don't mean to sound old-fashioned, but it (3D) sounds like a gimmick to me. You still have to wear glasses, don't you? Once they get the technology where you don't have to wear glasses, if that's possible, perhaps it won't be.
"You won't recognise me. They've changed the faces. It has taken three years to get the final results. It seemed crazy, when we were making it, that we weren't going to see the final results for three years.
"It was frustrating to be in the motion-capture environment. It's not like a film set, there are no props, and you're filmed from numerous angles: that information is then fed to the computer, and as long as they get one good take that's all they need, they can choose the angles and close ups later."
However, despite his reservations about the shoot, Crook is still confident fans will enjoy it.
He adds, "It's going to be a great film though."