3D Virtualand presents... ArchVis UI with UMG.
Essential Arch Vis UI for Unreal Engine 4.20.Update for Unreal Engine 4 Marketplace.
Material changer with UMG UI for substances.
It can be used for any kind of material.
Buy it in UE4 MarketPlace.
https://www.unrealengine.com/marketplace/archvis-ui-with-umg