looks like enormous cost for lumen in this scene. You can toggle lumen by placing a post process volume in the scene, set the extent to be unbound, and then set the reflection and global illumination to none, rather than lumen. I dont have this project, but I am using lumen in my own projects and not seeing cost like that…
I opened the scene in 5.3.2 and here is my performance: It stays pretty consistent like that. I turned the Engine Scalability to cinematic and material quality to epic. In play mode it stays at 60fps. I have two monitors on, they both are at 1920x1080 resolution. If I turn the screen percentage up that tanks the FPS and…