Here is some Youtube video of a robot that illustrates an issue I have sometimes when people describe a movie’s special effects as “photo realistic.” If I looked at a still photo of that robot, I might not distinguish it from a real guy. But if I watch it in movement, I instantly know it’s a robot.
I have the same problem with a lot of computer graphics in movies. They’ll look perfectly fine to me in stills, but there is something wrong with how they move. The things where actor’s face wrinkles are ironed out, like Patrick Stewart in Wolverine or Jeff Bridges in the new Tron movie, have this problem.