Most people know that not everything you see in a movie or TV show is actually real. Some productions, especially in the sci-fi genre, use a heavy amount of CGI. In order to create a particular spectacle, they use a technique called chroma keying. 

Chroma keying layers images on top of another to create a new image. The way that this is set up is through the use of a green screen. This lets filmmakers create visuals such as space battles and alien worlds without actually having to build them. Here are 35 green screen photos that show how Hollywood really works. 

4Game of Thrones

The massively popular Game of Thrones series couldn’t have been created without the use of extensive green screen technology. The amount of CGI and special effects demand it: It’s not like you’re going to find an actual dragon lying around, let’s be honest. Although you never know, maybe we just haven’t found one.

Game of Thrones is one of the most successful TV shows of all time in terms of viewership and critical acclaim. The series amassed over 160 Emmy nominations throughout its run and won many of them too. The series ended after Season 8, dividing audiences with the spectacle of a finale.