HDRP's SSR is still very bad. PBR accumulation can only be used on static images such as screenshots. There is no denoising like the EA Stochastic SSR. Just like path tracing accumulation, the previous frame and the current frame lerp and speed recovery... the latest settings are useless. Just more speed rejection. It might be good to use the RTR denoise shader for SSR. Except for Denoise, SSR performance is very poor at high resolution. I added Half resolution SSR to my local package. 4K 128 sample Full resulotion SSR Half resulotion SSR PBR SSR is basically the best ssr I've ever seen. but it prevents the use of performance and noise. Half resolution trace PBR SSR + denoise + Upscale (like TAAU) = Best ssr.