So yesterday i made something like a map editor using Unreal Engine Blueprints and UMG. This will be available to the UE4 community soon. 🙂

EDIT: You can download this from here: https://github.com/ryanjon2040/UE4-Map-Editor

Features:
Placeable buildings
Foliage painting
Placeable spawn point
Posses and Eject player
2 Camera modes: RTS and Free Cam