Shooting the actors against green screen, Burton says he avoided motion capture in favor of real flesh-and-blood performances filmed through special cameras. The human characters “needed to kind of blend in with the Wonderland world," the animated director says. “It was like their eyes, them, but in this sort of slightly mutated, or redefined, form." In the video above, free-associating director Burton explains his “whatever works" approach to making the PG-rated movie, which opens Friday. “It's been such a weird process…. We used so many different techniques that it really didn't manifest itself. Shots really didn't come in, in full, till the very end…. It was a constantly evolving thing."