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Ray trace denoiser problems with Automotive material pack

I have a raytraced car scene and have turned reflections denoiser to 0 to get decent paint reflections. This works great but I now have a problem as loads of other materials in my scene now have a lot of moving noise … especially the rubber materials!?

Upping the samples in the raytrace reflections settings (Post Process Volume) works but as a realtime assets slows it done quite a bit…

I found this image from another post which exactly replicates the problem I have…Is there anything I can do to fix this for realtime but maintain high quality reflection? Thanks

https://i.ibb.co/Xy26sCY/RTX-Rough-Reflections.gif

Check this article for tips on how to get rid of noise and get better quality reflections.

That is usually a sign for to few samples for reflections on rough/diffuse surfaces, so the first step would be to increase the samples for raytraced reflections.

https://youtube.com/watch?v=ZS6co7LPRYQ

Reflection noise.

Not sure, if there are many ways of optimising reflections, other than balancing the samples, the roughness (there is a max roughness setting in the Post process, which makes it blend or slowly switch to skylight i guess), and that raytracing quality node in materials.
Maybe this here helps, the reflection optimisation starts at 32:48

https://www.youtube.com/watch?v=wNsgxgOk8Ss