In 2009, David Sullivan, one of the leads in Primer, tweeted that "Shane Carruth's next project, A Topiary, is in the early stages of pre-production". Filmmaker Rian Johnson tweeted that it would feature a "mind-blowing sci-fi script." In 2010, several news sources reported that A Topiary was in the works and that the script had been written. There was already a website for the movie which, according to Carruth in an interview to io9, "The website for now is just a place mark as financing has yet to be completed. I'm cautiously optimistic that this can happen soon and couldn't be happier with the filmmakers that have committed to the project so far." However, the film (which Entertainment Weekly described as "a sci-fi epic about a group of kids who build a giant, animal-like creature") stalled, and in early 2013, Carruth told EW that it was "the thing I basically wasted my whole life on." Carruth no longer pursues the project; some VFX test footage of the film is visible in Upstream Color in a scene when a character is examining the video for technical flaws.