For the NVIDIA denoiser question, can you send in the scene via private uploader, and let us know which NVIDIA drivers you are using? (Bear in mind that the NVIDIA Denoiser is developed and updated by NVIDIA and not us ;) And a large part of its functionality is in the NVIDIA driver). Since it is only recommended for fast previews in IR, I'd suggest sticking with the Corona High Quality for finals, or the Intel Denoiser if you must use an AI denoiser, while we take a look at your scene. Thanks!