I was wondering if we could harnest NVIDIA OptiX denoiser in UE 5 somehow. Another amazing tool UE 5 is leaving behind.
Would love to know if I’m wrong!
Optix denoiser plugin is available in ‘Unreal Engine 5 Preview 2’ version. But there is no documentation on how to use it 
There is a slight mention of how to toggle it here
Search for ’ Optix Denoise Plugin’
When both the OptixDenoise and OpenImageDenoise plugins are enabled for your project, you must use the console variable r.PathTracing.SpatialDenoiser.Type to choose which denoiser will be used when denoising is enabled in the Post Process Volume settings. 0 (default) uses the OpenImageDenoise plugin. Set to 1 to use the OptixDenoise plugin.