Activate Interactive Denoising

The interactive denoising option can be found on the PrmanGlobalStatements node

Preferences

Cheap First Pass
If checked, the first pass will use a cheaper (slightly faster but lower quality) heuristic.

This can be useful if rendering something that is converging very quickly and you want to prioritize getting a denoised result faster.

Interval
The time interval in between denoise runs (in seconds)

LogInfo
Output logging info

Min Samples
The minimum number of average samples per bucket before the interactive denoiser runs for the first time.  Changing this preference requires the render to be restarted for this option to be respected