Night and/or rain absolutely tanks my performance and pegs the GPU at 100% usage (CPU no more than 70% on a single core). I'm running at 4K ultra on a 3080, performance is well above 60fps in dry/day races but my performance is being cut in half on night circuits. Before everyone screams that full grids on night/wet tracks are always more demanding in racing games, lowering settings and/or res makes almost zero difference (superscaling is off btw). I have to drop to 1080p medium settings to maintain 60fps in these races. On a 3080. I can be driving through a dry tunnel with barely any detail in the scene, no cars in front of me and still be dropping to 50fps. As a comparison, I can run F7 at a solid 4k 120fps ultra, FH4 at 4k 100-120fps ultra.