Published on April 2, 2026
“I was never really into the occult before making this movie,” says Ian Tuason, the writer-director of the new A24 horror film, undertone. “After doing research, I started getting into it more. That manifested weird things into existence.”
Undertone, a chilling entry into the horror genre, employs a demonic “found audio” narrative that stems from Tuason’s innovative background in immersive filmmaking. He is well-known for his pioneering 360-degree VR horror shorts, such as Continuity Problems (2009) and Close Up (2011), which not only gained significant traction on YouTube but also made waves at the Marché du Film’s NEXT Pavilion in Cannes. His subsequent project, the live-action 360-degree horror experience 3:00am, captivated audiences, amassing an impressive 9 million views on the platform.
The film, which marks a departure from his previous projects, delves into themes that resonate with Tuason on a personal level. It explores the ramifications of dabbling in powers beyond comprehension, drawing both from immersive horror and unsettling real-life experiences that the filmmaker faced during production.
Filming undertone proved to be an enlightening journey for Tuason, as the filmmaking process unearthed unexpected challenges. He has spoken openly about peculiar occurrences that took place while working on the film, suggesting that the themes explored may have unlocked something within the creative process. “It felt like something was telling us to be cautious,” he reflects, hinting at a tangible connection between the supernatural elements of the narrative and his real-life experiences.
The casting process also played a crucial role in the film’s evolution. Tuason cast Nina Kiri, known for her impactful performances in previous horror films, to portray one of the lead characters. Their collaboration brought a dynamic element to undertone, pushing the boundaries of traditional horror storytelling. “Nina embodies the raw emotional depth the character requires,” Tuason notes, emphasizing the importance of having a strong performance to amplify the film’s eerie atmosphere.
As anticipation builds for its release, critics are already hailing undertone as one of the scariest films of 2026. The film’s unique approach to horror, combined with Tuason’s dedication to authenticity, is set to leave audiences questioning their perceptions of reality and the lurking darkness that resides within. With its premiere just around the corner, viewers are advised to prepare for a chilling experience that might just blur the line between fiction and the supernatural.
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