How can I denoise transparent (delta rays) with NRD?

[ludi1991]

I am trying to use NRD for referencePT in 《ray tracing gem2》 chapter14. Now it works for opaque object. But there seems no NRD sample code for transparency. Any helps? Thanks!!!

[dzhdanNV]

The short answer is - different guides: properties at hit. RTX REMIX uses this. In my opinion, more smart tracing and data reuse (already in the NRD sample code) allow to live without denoising (TAA or DLSS will do the job) or use a specialized light-weight denoiser instead (which I would be happy to start to work on, if I had more time).

[dzhdanNV]

Modern NRD sample shows how to get path traced glass working without denoising (denoised only by TAA/upscaler).