Hi everyone! I’ve had a huge problem with Unity for a while. All my models and objects have jagged edges! It looks horrible but I know it can be fixed, I have seem loads of Unity games without it. After seeing others get the answer “Turn on Anti-analyzing”, I did. No difference.
Any help will be appreciated! 
Maybe you should take a look at this page :
if you tried this settings well. use some PostEffects but i don’t recommend!
i got best results from unity settings always.
I had to change the Model Quality Settings in my Nvidia Graphics Card Control Panel. AA now works perfectly
Below answer is valid for an NVIDIA dedicated GPU, I believe there must be a somewhat similar setting for AMD graphic card as well. So, coming to the solution, even if turning Antialiasing to x8 is not solving your problem then you need to go to your “NVIDIA Control Panel” >3D settings> Manage 3D settings> Antialiasing-FXAA turn it “ON”, and make sure that the Antialiasing-Mode is “Application-controlled”. Now, restart unity, jagged edges should be gone.
Thanks,
Nitish