Also, the scene is incredibly noisy, even with lumen settings maxed out across the board. I understand this scene breaks most of the core assumptions for optimizing real-time ray-tracing (neither perfectly lambertian or specular, no easy ray termination), but just something that I think should be worked on when there’s the time. On the bright side, everything in that scene except for the glass is Nanite, and it works flawlessly. Excellent work, Epic devs!