How to make a window that shows a different level?

So for an application we want to try and make a sort of infinite diorama where the view of the horizon actually changes as you look through the back plane.
My concept was to get a viewport of some kind that showed a different level than the one the user was currently in but that had the terrain that we want. I just can’t figure out if there’s a way to do this already in ue4 or if I’ll have to build it out myself.

Hi!Yes you can make this window,but you should build it by UE4 Slate System,that will allow you to this second window.In UGameEngine,there is a method that called CreateWindow which will return you a new window.I think the best way is to take a look how a different viewport is made inside of Paper2D plugin.