# Making of Mimořádná Událost — Virtual Production Set

> How More.is.More designed and ran the LED virtual-production volume behind Jiří Havelka's feature Mimořádná Událost — a film shot almost entirely inside a train carriage.

Canonical: https://moreismore.cz/notes/mimoradna-udalost-vp-set

On 19 February 2019, a regional train in the Czech Highlands began rolling backwards — driverless, its brakes failed, its passengers still aboard. It stopped, safely, several kilometres later. The story was strange enough to become a film: director Jiří Havelka's *Mimořádná Událost* (*Extraordinary Event*, 2022), set almost entirely inside a single train carriage.

A carriage is close to the worst set you can ask for. Glass on every side, reflections in every direction, and a script that demanded the landscape outside keep moving. Green screen was out — too much spill, too many reflections — and shooting on a real moving train would have tripled a thirteen-day schedule. So the production came to us.

We designed and ran the virtual-production volume: a Mandalorian-style LED stage built around the carriage, with 18 × 3.5 m Kvant LED side walls, a front wall, and panels overhead standing in for the sun. We shot 8K plates of the route in advance, stitched them into 360° spherical panoramas, and played them back on the LEDs in real time — driven by Unreal Engine and Ncam camera tracking, so the world beyond the windows moved with the camera, in-camera and frame-accurate.

Tracking inside a cramped carriage is its own problem: no floor to work from, the camera repositioned for nearly every shot, Havelka shooting in chronological order. We ran the tracking sensor tilted 60° upward against reflective markers on the carriage ceiling, so a single operator could re-rig between setups and stay locked on. Colour was handled live too — graded in DaVinci Resolve on set and fed straight back into the engine, so what the DP saw through the lens was close to final.

By wrap, roughly 85% of the finished film had been captured this way: one of the first European features built almost entirely in-camera.