How to have POM in UE4?

How to have POM (Parallax Occlusion Map) in UE4 like Cryengine 3?
I have tested some materials that comes with the editor like the “M_CobbleStone_Pebble”
but it looks very flat and strange, I’ve exported the same textures into Cryengine 3 and it looks much more realistic
so UE4 uses BumpOffset instead of real POM?