
There is a free, open-source denoise tool called Jiangtherapee that can fix the abnormal bell curve in the dynamic range at ISO 64 for Nikon Z8/Z9 cameras.
The general tool works for most Nikon cameras. The special “Rescue Z8” button is for Z8/Z9 models only.
Additional information is available here (see also the related video in Chinese). Here is the AI recap of the tool:





































