11.And here's the crew setting up another scene in Matilda the Musical: 12.Here's James Franco in The Disaster Artist on the roof of a totally real building that isn't fake at all: ...

If you know anything about how films are made then you have probably heard about the “green screen” before ... an actor filmed in front of a green background. Using video editing software ...

All of this is just LED screens displaying backgrounds pre-made in a video game engine. Compare that with this fight scene from "Avengers ... can solve a bunch of green screen problems.

The isolated subjects would then be placed on top of a pre-shot background ... on the scene. This is the blue screen, developed by Lawrence Butler and it looks and works similar to the green ...