i have problems with hair antialiasing:
and here is my setup:

howto fix this?
Try Temporal Anti-Aliasing (TAA) as method option
Also your Hair model has a lot of too small meshes
FAA is better than TAA!! does exists an option to using SMAA??
GitHub - Chman/SMAA: A highly customizable implementation of Subpixel Morphological Antialiasing for Unity (not sure if it works with Unity 2017+)
FXAA might give good results, but it tends to blur everything a bit.
If the hair is using transparent pass then try cutout for now for a quick immediate effect. What is happening as far as I can see is that antialiasing is only being applied to the opaque pixels, so you’ll have to work with that, or shift the antialiasing to after transparent pass and use TAA (should be an option or define somewhere - give it a search regarding Unity’s own TAA).
So I’m just guessing that the problem is when your image effects are applied or your hair shader.
Thanks … its working :]
nope … all of hairs and brows and lashes and mustache are geometry!! real hair geometry not hair cards :]
I see, that’s why then. I would advise you switch to cards but you seem to have made your mind up!