A film set featuring two vehicle mockups surrounded by crew members in green screen suits. Equipment and cables are visible on the floor, with crew members adjusting the vehicles and preparing for a shoot.

Crossbow Confidential: PFX’s Digital Dashboard Keeps ‘Locked’ Rolling

PFX marshals 60 artists, a lidar-scanned SUV and its Crossbow app to steer 750 shots for Locked through four months of frantic VFX.

In this behind-the-scenes interview, we speak with Jindrich Cervenka, a seasoned VFX Supervisor at PFX. His recent work on Locked—a claustrophobic thriller set entirely inside a car—offered a unique set of challenges, from invisible compositing to seamless CG integration. In our conversation, he walks us through the creative problem-solving, the surprises, and the collaborative hustle behind the film’s visual effects.

PFX PFX is one of Central Europe’s most dynamic visual effects and post-production studios, headquartered in Prague with additional offices in Bratislava, Berlin and Warsaw. Known for their versatility across genres and formats, PFX has contributed VFX to major international films, including Land of Bad and Medieval. With a team of over 400 professionals and a focus on both creativity and technical innovation, the studio brings a full-service approach to everything from CG environments and digital doubles to compositing and pipeline development. Locked was a standout ...


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