There are two denoising options available for rendering with Arnold:


OptiX™ Denoiser imager


Arnold Denoiser (Noice)

The Arnold Denoiser (Noice) can also be run from a dedicated UI, exposed in the Arnold Denoiseror 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).