Stranger Things VFX expert Julien Hery has revealed that one visual effects shot in Season 4 took over two years to make.
Hery discussed the show's CGI sequences in an interview with Collider. "Actually, there's a fun fact, we started before the pandemic on this show, we started to work on it more than two years ago," he said. "We actually started to develop a few looks, started to work on the assets before the pandemic. And when it stopped, we kept working on one or two shots. One is a flyover of Hawkins -- to follow the bats over Hawkins, and then you land [on] the Creel house. And this shot took us almost a year and half or two years of making it happen, changing the animation, and there was plenty of time, so we took like such a long time to develop that shot. So it was pretty cool."
Though Hery doesn't reveal the second shot that took nearly two years to make, Stranger Things season 4 featured a handful of impressive CGI sequences, any of them could have taken just as long as the demobat scene.