The “running up the hill” scene from Stranger Things was one of the most talked about scenes of the show. But what people may not know is that the scene was actually shot on a stage, and not in the woods like it looks.
To create the illusion that Sadie Sink was running up a hill, they used a blue screen and stage. The blue screen was used to create the background. They then edited it all together to make it look like she was running through the woods.