>>398584881
Nice work. if you haven't seen it, https://www.youtube.com/watch?v=Ibe1JBF5i5Y has some interesting details on how Ghosts of Tsushima did their grass. One trick that stuck out is for shorter but bushier grass you can fold each blade in half so you can otherwise use the same shader. 

>Ideally it should vary in pitch as well
can you animate AudioSource.pitch?