Landscape Material with Macro Variation Material Functions.
Same Macro variation Epic uses in Unreal Engine Starter Content. Greatly reduces texture tiling noticeability for more realistic results!
Site Won’t allow me to submit material nodes for UEFN so just use the pictures. Set Up to work with Quixel ORDp Textures.
Create 2 material functions like the ones in pictures and put them in layer 1 of your Master Material, or just put content of the functions in the master material if you know what you are doing.
You’ll need to check “Use Material Attributes” click on final output node, find it on side detail panel. Also either grab Macro variation texture from a version of unreal engine or here.
You can have more layers than 3 but don’t add too many. Hopefully I could get it across. If you really want to and can’t get this to work hit me up and maybe I can upload project files or something! Or we could collab.
Epic make it so we can share UEFN Materials somehow! Needlessly hard! 
https://dev.epicgames.com/community/learning/tutorials/mM97/fortnite-landscape-with-macro-variations-for-uefn
The guide is a bit confusing, by any chance you can make a video tutorial. Been at this for awhile with other videos and it doesn’t seem to change my landscape.