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What is Lumen in Unreal Engine 5?

Unreal Engine 5 Lumen

Lumen is the new global illumination and reflection system created within Unreal Engine 5 to support the new generations of gaming consoles.

Lumen harnesses a fully dynamic indirect lighting pipeline which works in unison with any environments geometries, materials and light properties to provide optimized artist workflow. The optimized workflow is achieved through the full dynamic indirect lighting pipeline providing instant lighting builds and reflection captures. Lumen removes the need for reflection cubemaps, since it fully replaces other methods and is able to render geometrically precise reflections.

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