Starting with the original in Camp Miasma in 1980, the horror franchise went on to have a long life. There were multiple sequels, spinoffs in the form of arcade cabinets and board games, and just about every kind of merchandise you can think of, from alarm clocks and lunch boxes to Halloween costumes and action figures.

It got so popular there were even knockoff costumes at party stores. For several decades the franchise exerted a powerful, albeit dwindling, impact on the world of horror.

But if you haven’t heard of Camp Miasma, that’s okay, because it doesn’t really exist. It’s a fictional franchise at the heart of Teenage Sex and Death at Camp Miasma, the latest film from I Saw the TV Glow director Jane Schoenbrun.

In order to convince audiences that Camp Miasma — an ongoing saga about a character called Little Death who terrorizes a summer camp — could be real, the production designers had to create a whole lot of objects that detailed the movie franchise’s fake history. “We probably could’ve spent three years only making stuff for Camp Miasma if those were the marching orders,” says production designer Matt Hyl and.

Teenage Sex and Death at Camp Miasma tells the story of a budding director named Kris (Hannah Einbinder) who has been given the green light to reboot the long-dormant Camp Miasma franchise. Before doing so, she decides to meet up with Billy (Gillian Anderson), the final girl from the first film in the series, who has spent decades isolated in the woods.

Image: MubiBut before that, there’s Camp Miasma. The film — the real one — wastes no time in quickly telling the history of the franchise during the title sequence.

Through old movie posters, VHS tapes, toys, photographs, and even film reviews and news articles, you learn how the series started off strong before steadily dwindling, going from box office success to direct-to-video dreck over the span of around 30 years. Those objects become a powerful and efficient tool — though the process of creating them wasn’t quite so quick and efficient.

First, the designers spent a long time doing research, looking at existing slasher series like Friday the 13th, Sleepaway Camp, A Nightmare on Elm Street, and Halloween in order to get a sense of how those films looked and how they permeated culture at large. From there, they made a kind of historical document, informed by Schoenbrun’s script, which outlined the entire existence of Camp Miasma: when each movie came out, who directed it, how it was received, and what kind of merchandise was released.