Epic Games released Unreal Engine 5.8 on Wednesday, introducing a Lumen Lite mode that makes dynamic global illumination viable on Nintendo Switch 2 for the first time. The new mode targets 60 fps on the console, in both docked and handheld configurations.
The update shipped alongside Epic’s State of Unreal event in Chicago. Simon Tourangeau, Unreal Engine’s Vice President of Engineering, described UE 5.8 as a response to what studios had been asking for most: performance and stability across platforms.
What Lumen Lite mode does for Switch 2
Lumen is Unreal Engine’s system for fully dynamic global illumination and reflections. The standard implementation carries a GPU cost high enough to rule it out on lower-powered hardware. The Lite variant switches to irradiance fields with probe occlusion, running twice as fast as Lumen High Quality while retaining most of the visual quality. PC support is included as well.
Epic describes the medium scalability level as targeting 60 fps on Switch 2, with handheld mode included. The company’s release notes describe it this way: “Lumen dynamic global illumination now offers a Lumen Lite mode, which is designed to preserve much of the visual impact at a significantly lower GPU cost by using irradiance fields with probe occlusion.”
At the State of Unreal keynote, Tourangeau explained the scope: “That makes Lumen viable where it wasn’t before, including on Switch 2. And that work is already helping drive further Nanite optimization efforts for the platform.”
Tourangeau’s mention of Nanite indicates the Switch 2 work extends beyond illumination. The optimization effort behind Lumen Lite is already feeding into further Nanite improvements on the platform.
Other changes in UE 5.8
The headline addition beyond Lumen Lite is Mega Lights, which allows thousands of dynamic shadow-casting area lights in a scene at a fixed GPU cost. Previously, each dynamic shadow light required careful budget allocation. Artists can now place far more lights without paying a per-light performance penalty.
Epic also reports a 68% reduction in shader count in Fortnite from combined engine and content changes. Cook times, load times, and memory use all improved as a result.
Several systems move to production-ready status in this release, including Movie Render Graph, Chaos cloth authoring via Dataflow, Audio Insights, and Iris, Epic’s networking library.
UE 5.8 is the final Unreal Engine 5 release
Epic confirmed UE 5.8 as the last planned major update for the Unreal Engine 5 branch. The company will now focus on Unreal Engine 6, announced this week alongside a teaser for a “new era” of Rocket League. UE6 is not on a public release roadmap, and no timeline was given at the event.
For studios targeting Switch 2 with Unreal Engine titles, the practical result is concrete: games that depend on dynamic global illumination can now target 60 fps on the platform. That was not achievable before this release.