In Marvel’s most recent Blockbuster movie X-Men: Days of Future Past Directed by Bryan Singer, the X-men go at it with the Sentinels in an epic battle, a group of dystopian-era robots who are able to mimic any mutants’ abilities by absorbing their DNA. So how does one visually create a robot who can be any mutant, all in one? With a complicated animation process involving blades, independent flaring and texture changes for thousands of individual scales. The faces of the Sentinels were so complex that the artists actually needed to render the animation by hand taking countless hours of pain staking precision to accomplish the end result shown in the video. Mike Seymour for Wired explains how the VFX outfit Motion Picture Company (MPC) did it.