Overview

• In an Unreal Fest Seoul interview, Sweeney said many studios build for high-end PCs first and postpone low-spec testing until late stages, fueling stutter and low frame rates.
• Epic will introduce automated optimization across devices and expand developer education so optimizing early becomes standard practice, with engineers available to step in when needed.
• Epic is integrating Fortnite’s optimization technology and know-how into Unreal Engine to improve performance on low-spec PCs.
• Unreal Engine 5.6, released in June, includes shader, Lumen, and Nanite improvements that reporting estimates can lift GPU performance by up to 25% and CPU by up to 35%.
• Developers remain divided on root causes, with some pointing to platform limits such as Xbox Series S memory, even as recent UE5 releases like the Metal Gear Solid 3 remake and Mafia: The Old Country drew criticism and others like Hellblade II and Fortnite performed well.