There are three denoising options available for rendering with Arnold:


OptiX™ Denoiser imager

Oidn Denoiser imager


Arnold Denoiser (Noice)

The Arnold Denoiser (Noice) can be run from a dedicated UI, exposed in the Denoiser tab of the Render Setup window, or as an imager. To use the Arnold denoiser, you will need to render images out first via the Arnold EXR driver with variance AOVs enabled. It is also available as a stand-alone program (noice.exe).