Since the invention of film, filmmakers have tried to trick viewers into believing that an actor is either shorter or taller than they really are. The most classic techniques are sticking an actor on a platform or having them interact with props built to scale. But those need to be paired with clever camera angles and visual effects. In “The Lord of the Rings: The Fellowship of the Ring” (2001), director Peter Jackson employed a forced perspective so Gandalf would really look like he was interacting with a hobbit. More complex computer-controlled camera moves and blue-screen compositing helped make the shots more complex and were used further in “The Two Towers” (2002), “The Return of the King” (2003), and the “Hobbit” trilogy (2012 to 2014).