3dsmax twoway plane/grass animation - question

So i was wondering how a specific modell/effect was done. I know this here might not be the best place to ask about it but since i have no other forum to ask i figured i might give it a shot.

so how would one achieve to create a grass plane like in the pictures below that are visible both ways.

I can think of modelling it which seems realy tedious but it does look more like its drawn in photoshop and then somehow put into a 3d programm and then animated.


Any help is appreciated maybe someone guiding me to a tutorial ( i couldnt find any) or anything so i can read about it.

Thanks and cheers.

that is a double sided shader in Unity.
Search double sided shader and you will find a lot more info than I can type here.