Virtual production is one of those terms that gets used loosely — sometimes to describe any shoot that involves digital elements, sometimes specifically to mean LED volume work with real-time game engines. In this guide we’ll clarify exactly what virtual production means in its current, most technically demanding form, explain how the technology works, and give you a sense of what’s actually happening on set when you see those vast glowing walls behind the camera.
The Short Definition
Virtual production, in the sense most people mean today, is a filmmaking methodology where real-time 3D environments — rendered live by a game engine — are displayed on large LED panels around the actors and physical set elements. The camera films the LED content as if it were a real background, with the virtual world responding in real time to camera movement so that perspective and parallax behave as they would on a location shoot. The result can be composited into the final image in-camera, without greenscreen or post-production replacement work.
The Key Technologies Involved
Four interlocking technologies make modern virtual production possible. First, high-resolution LED volumes — walls and ceiling panels built from fine-pitch LED tiles capable of displaying content bright enough and sharp enough to be captured on film without visible pixel structure. Second, real-time game engines, most commonly Unreal Engine by Epic Games, which can render photorealistic 3D scenes fast enough to keep up with camera frame rates with minimal latency. Third, camera tracking systems that feed live position data — where the camera is in physical space, where it’s pointing, what lens it’s using — into the engine so the virtual camera matches the real one exactly. And fourth, colour calibration and camera matching workflows that ensure the LED content is tuned to the specific camera, sensor, and lens combination being used, so the light coming off the wall wraps around physical set elements convincingly.
Why Game Engines?
Traditional visual effects rendering — the kind used to create blockbuster CGI — can take hours or even days to render a single frame. Game engines are built to render full 3D scenes in real time, at frame rates of 24fps or higher, by making intelligent trade-offs between visual fidelity and computational speed. The gap between game engine graphics and high-end VFX has narrowed dramatically over the past decade, to the point where for backgrounds, environments, and atmospheric lighting, real-time rendering is often indistinguishable from the alternative — and considerably faster and more flexible to work with on set.
What Happens on a Virtual Production Set
When a director calls action on a virtual production stage, several systems are running simultaneously. The tracking system is reading the camera’s position many times per second and sending that data to the render node. The render node — a high-spec workstation running Unreal Engine — is consuming that positional data and updating the virtual camera inside the 3D scene to match, then pushing the rendered frame to the LED processor, which drives the physical panels. All of this happens within a window of roughly one to two frames of latency, meaning the virtual world moves convincingly with the camera from the operator’s perspective, and crucially, from the perspective of what the camera lens sees.
On set, the practical effect for the crew is that the environment is already there. The gaffer can light the actors against the actual colours and intensities that the background environment is producing. The costume department can dress for the location as it will actually appear. The director can look through the viewfinder and see a composite that closely approximates the final image, without waiting for post.
What Virtual Production Is Good For
Virtual production excels at locations that are impractical, expensive, or impossible to shoot on — alien landscapes, historical environments, extreme weather conditions, large-scale architectural interiors. It’s also well-suited to sequences that require precise creative control over lighting and atmosphere: a golden-hour exterior that needs to stay at golden hour for an entire shooting day, for instance, rather than the 20 minutes nature provides.
It’s worth being clear that virtual production isn’t a replacement for location work or traditional stagecraft — it’s a tool with specific strengths. For wide, dynamic location work where the camera needs complete freedom, or for sequences where real environmental interaction is important, shooting on location usually wins. Virtual production is most powerful when the environment needs to be controlled, repeated, or simply doesn’t exist.
Come and See It for Yourself
At Vedri, we’ve built our studio specifically for in-camera virtual effects work at the scale that independent productions and commercials demand — without the overheads of the largest stages. If you’d like to understand the technology better before committing to a production approach, we offer studio visits where you can see the full pipeline running live. There’s nothing quite like looking through the viewfinder to understand what virtual production can do.
