We already have our island’s Landscape, so it’s time to keep working on the geometry. To do that, we now need to create a master material that we can apply across our Landscape and RVT, plus a bit of Packed Level Actors so we can start dressing our level.
https://dev.epicgames.com/community/learning/tutorials/Dwp8/unreal-engine-level-creation-workflow-part-6-master-material-rvt-and-packed-level-actors