Unreal Engine is best known as a game engine developed by Epic Games used in a variety of genres, including first-person shooters, platformers, fighting games, MMORPGs, and other RPGs. The Unreal Engine User Group showed of what it could do in real-time at SIGGRAPH 2019 turning LED walls into a lifelike desert for a commercial shoot. Read more for a video and additional information.
Put simply, this new technique makes use real-time camera tracking to seamlessly blend actors and the set together using LED walls, making it appear as if the colors of the projected screen reflect perfectly with realistic lighting conditions. You won’t have to deal with post production since everything is happening real-time and in-camera.