Lumen brings robust dynamic global illumination to Unreal Engine and integrates well with other supporting systems in Unreal Engine 5, such as Nanite, World Partition, and Virtual Shadow Maps. ![]() When Lumen is enabled for a project, precomputed static lighting contributions are disabled and all lightmaps are hidden. In each category, set the following to enable Lumen: Global Illumination and Reflections can be set independently. Lumen is enabled from the Project Settings under the Rendering > Dynamic Global Illumination and Reflections categories. This prevents breaking or changing any lighting paths within those projects. Newly-created projects have Lumen Global Illumination and Reflections enabled by default, as well as their dependencies like Generate Mesh Distance Fields.Įxisting projects converted from Unreal Engine 4 to Unreal Engine 5 will not automatically enable Lumen features. Lumen renders diffuse interreflection with infinite bounces and indirect specular reflections in large, detailed environments at scales ranging from millimeters to kilometers. ![]() Lumen is Unreal Engine 5's fully dynamic global illumination and reflections system that is designed for next-generation consoles, and it is the default global illumination and reflections system. Disabling Static Lighting for the Project
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