This issue comes from old Arma series. It's a real big problem for range shooters. You finding nice (how you think) position in a toll grass next to the stone.... and you should be invisible from far distance.....and this is nothing but illusion. everybody can see you from far.....and they don't need any scopes or binoculars. Just hold right mouse button.... and see plain green mountain..... no grass.... just one clearly visible guy next to the rock. And he can wear what ever he wants....regular camouflage , ghilly suite...dissent matter. everybody can see him. P.S.
I do understand that it's impossible to render all grass and bushes so far, but you should do something to minimize visibility of camouflaged person lying in grass. without this....proper sniping is impossible.