We live in an exciting age where computer-generated graphics can be virtually indistinguishable from the real thing, which makes big-budget movies as much about rendering farms and rooms full of digital artists as it does old-fashioned acting. But sometimes, it just feels good to fire a missile on a movie set: the critically acclaimed (but underperforming) sci-fi thriller Edge of Tomorrow involved a lot of practical effects, it turns out, as a new montage shows. …