Someone could teach creating grass, plants, trees with 3D programs imported into UE4?
Just search on youtube for e.g 3d low poly tree tutorial, … then you will find pretty good ones. 
e.g here is a grass tutorial for UDK : ://forums.epicgames/threads/867667-UDK-Grass-tutorial
plant: ?v=riyOfKz9YoI
Oh perfect! thx man. 