Note: The following video is pre-alpha test footage, and in no way represents the quality of the final game.

It’s hard to see due to the video framerate and compression, but there are volumes for affecting the grass parented to the player’s feet.

Credit for the effect goes to Daniel Wenograd.

To add this to your own Unreal Engine 4 project, check out Daniel Wenograd’s post on the UE4 forums.