Dithering?

[eobet]

This AO effect seemingly does not use any dithering at all.

If you want to use a sharpening script on the camera, that means that the AO shadows get pronounced banding, which is really ugly:

Could you please add dithering to this asset?

[keijiro]

Answer to your case: I recommend using the dither effect in the post processing stack.

https://github.com/Unity-Technologies/PostProcessing

By the way, I have the impression that the current implementation of MiniEngineAO has some precision problems in its denoise filter. I keep this ticket opened till I revisit the problem.