It used to be that movies were made using mostly practical effects. Meaning, if you saw something happen on the big screen, then it actually happened in the real world. But then people started getting hurt really bad (sometimes to the point of no return), and when technology started giving filmmakers more options with blue and then green screens, the move to CGI began. Today's films are shot with lots of green screen work — so much so that you have to wonder what it looked like to begin with. And even more interesting, sometimes CGI is used just to fill in a background or change the sky, like in The Wolf of Wall Street shown below.
Take a peek at some of these cool before and after shots. Some of them make sense (dragons don't exist, after all), but others ...
Guardians of the Galaxy
The Wolf of Wall Street
X-Men: Days of Future Past
Pirates of the Caribbean: Dead Man's Chest
The Dark Knight
Game of Thrones
via Bored Panda
Kevin Whipps is a writer and editor based in Phoenix, Arizona. When he's not working on one of the many writing projects in his queue, he's designing stickers with his wife at Whipps Sticker Co.