ohh well.
that internal gpu is not exactly supported to run ue5 with everything. i can disable my 3060 and look at the same result. i have almost the same igpu. if i ignore the fact that my igpu driver is an old factory driver (for reasons). ue5 does warn that rendering features are missing when running dx12 rhi, so… you should know that it will not run with everything. dx11 throws no errors but it doesn’t run better either.
actually testing… it does not run lumen GI. it only does (pretty bad) ambient occlusion (that needs very thick walls or it leaks, btw). mirrors only work with planar reflections and those only work on low qualiity. and while you are on low reflections, screenspace doesn’t work. so you gotta pick planar or screenspace and fake the mirror with a custom scene/reflection capture. that’s how you would get a mirror to work.
i get 48 fps (not limited) in that tiny window, btw. you would call that performant?
so… you should forget about dynamic gi and bake the stuff, reflection probes and all that lighting. or get a proper gpu. this lil internal one is not gonna get it done.
i think i’m done here. clearly a hardware feature support issue.