Unreal Engine & LED Walls: The Depth vs. Time Trade-Off

Trying to integrate Unreal Engine environments with an LED wall for a recent sci-fi short taught me a critical lesson about pre-production vs. real-time flexibility. We decided against a full green screen workflow to gain interactive lighting and realistic reflections instantly. What worked incredibly well was the immediacy of the interactive light on talent and props, it felt organic and saved us hours in lighting setups, especially for scenes requiring rapid time-of-day changes or atmospheric shifts. The Unreal scenes, pre-rendered as EXR sequences for the wall, looked fantastic and the talent really fed off the environments.

What didn't work as planned, or rather, where we faced a significant compromise, was depth. While the LED wall gives you 'infinite' background, achieving true parallax for close-ups or complex camera moves without extensive tracking and real-time rendering on the wall itself became a headache. We had to simplify some camera movements that would have been trivial on a traditional green screen with post-comping. The time saved in lighting was often re-invested in tweaking assets in Unreal to hide the flatness for specific shots, or in locking down the camera much more than anticipated.

It felt like a trade: genuine on-set immersion and lighting speed for backend depth flexibility. Are others finding a sweet spot for maximizing parallax on LED walls without going full real-time virtual production, or is that the inevitable next step for truly dynamic shots?