Hello,
As it’s said in the docs, getting displ map to work is simply requiring a tessellation option and nothing else.
Though I’m confused what else it takes to get it to work.
Here is my mat in UE4:
://s1.xum.ir/2014/12/23/14dc92.jpg
And here is how it is in Toolbag 2, it should look the same in UE4 with the displ map being applied.
://s1.xum.ir/2014/12/23/Prep5.jpg