Unreal Engine 5.8 Paves Way for Better Optimization in UE6

Unreal Engine 5.8 has just been announced by Epic Games as the last major update to Unreal Engine 5 before the launch of Unreal Engine 6. While there are a number of changes present in UE 5.8, including streamlined texturing and landscape creation, and sandboxes for isolated experimentation, to name but a few, two new headline features are coming to the real-time rendering pipeline with UE 5.8. The first it Lumen lite, a new version of Lumen dynamic global illumination specifically designed to offer as many of the features and as much of the artistic quality as full-scale Lumen with much lower GPU compute costs. According to the update notes, Lumen lite can be as much as twice as fast as Lumen High Quality, and it is lightweight enough to run on the Nintendo Switch 2 at 60 FPS.

The other new tool available to developers is MegaLights, which is now production-ready and allows artists and developers to place dynamic and shadowed area lights into scenes to improve quality and reduce noise. Epic cites a performance target of 60 FPS on current consoles and has included dedicated debugging tools to make game optimization easier with MegaLights. Unreal Engine 5 has been the scapegoat of many complaints by PC gamers about poor game performance—even if there are examples of visually striking games built on UE5 that are well optimized—and Lumen global illumination is one of the features that tends to take at least some of that blame. Both of the new features are supported on PC, along with many of the other new rendering tools, like Fog Screen Space Scattering, which improves volumetric fog and dust rendering, and a new toon shader for stylized games.