Feature Request SSR PBR Accumulation Half resolution tracer and denoising.

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.

 

Ray tracing reflection is in mixed mode. When I "nothing" the raytracing layers. I got the result I wanted with SSR and RTR denoise shader. It is affected by SSR Accumulation Skyreflection and looks brighter. The RTR Raymarch is excellent. I increased the deposition factor so that the reflection denoise shader produces a result closer to PBR accumulation.

 

Would this technique work on non ray tracing capable GPUs as well?

 

I do not think so. because mixed mode basically continues to ray trace. I just turn off the layers so that only ssr does not work. but still the offscreen reflection is calculated by ray trace.

 

Thanks for the quick reply. Also I've been looking at your fix for half res SSGI in another thread. Are you aware if Unity implemented your half res fix in the current implementation? Or will the change still need to be made manually?

 

Yeah. I haven't looked at LTS. I know it's implemented in alpha.

https://github.com/Unity-Technologies/Graphics/pull/6903/files

 

That's good to hear! You're super talented, Unity should hire you haha

 

thanks, unity should hire this guy before me

https://twitter.com/Passer1dae

 

Hey!! How did u set it to half resolution???

 

I made a lot of changes in HDRP code and ssr shader. performance was good but there were artifacts in the accumulation and terrible denoise...