Independent reference · not affiliated with Epic GamesSources & coverage ↗
UNREAL ENGINEWORLD /← Return to the reference

UNREAL ENGINE WORLD / RESEARCH EDITION

Lumen: check the lighting path

Supplied Immortals of Aveum production artwork illustrates an interior; it is not evidence of a measured Lumen configuration.
Supplied Immortals of Aveum production artwork illustrates an interior; it is not evidence of a measured Lumen configuration.

Primary source checked · 27 September 2026 · Not a hands-on test

Lumen handles dynamic global illumination and reflections. Epic notes that converting an older UE4 project does not automatically enable Lumen, which helps preserve its existing lighting path.

Enabling Lumen hides precomputed lightmaps. Small, bright emissive regions can introduce noise. Our review prompt: inspect an interior, exterior and camera transition before deciding on a project-wide lighting change.

Read the evidence