Very Realistic grass

Hi everyone.
I need to make a scene where I see a field of grass (medium height) with some wind that moves the grass.

I need the camera to be from avove (the best would be at 90°) and I need the grass to be a lot realistic...I don't mind the performance, I can use a very good pc(1080Ti with a i7)....any idea?

I tried with the Unity terrain/grass but i wanted something 3d and not made with a png....

Thank you

EDIT: I need to use unity 2017 ( I'm not sure if I can use 2018)