I couldn’t find these stuff easily online (+ most of them were broken), so I spent some time to create the ultimate(for me) landscape material.
Step 1) Make heightmap (in or out of the engine)
Step 2) Configure the material properly
Step 3) Apply the material (and let it generate the colors)
Step 4) Paint ontop if you want (paths , roads , special areas etc)
This is the playlist: (4 videos in total , I suggest you watch them all from the start)
Special Thanks: Kevin Antonio Mitchell