Lux, Lumen, Candela - Unreal Engine Lighting Explained #unrealfest

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Published on April 4, 2025 3:05:17 PM ● Video Link: https://www.youtube.com/watch?v=Nke2xMyZT_0

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From the lecture: You’re Probably Lighting Wrong: Physically Based Lighting in UE5 | Unreal Fest Gold Coast 2024

Join Sean Gobey for an end-to-end overview on lighting and how to make your projects shine in Unreal Engine.

Unreal Engine has wonderful physically accurate lighting and camera systems yet most developers don't fully understand how to get the most out of them. For example, the default directional light value is 6 lux, yet the sun is 120,000 lux.

So what does 6 mean? Where does this value come from and how do we tune the rest of the system if we're working with arbitrary numbers? If we're not introducing enough light, how does that affect our camera settings?

#unrealengine #ue5 #unrealfest2025 #unrealighting #3dlighting #lumen