Low Poly Terrain in Terrain Editor or PolyBrush

Hi there, is there a way to create low poly terrains using either the terrain tools or polybrush?
Cheers

 

I'm new to the new terrain, so you'll probably get a better answer, but during my research, I saw this video with is a back and forth method between Unity to Blender. It works with a script that exports your terrain from Unity to an .obj format.