Once you’ve learned the basics—or if you already have some experience—we’ll move on to learning all of UE5’s Landscape tools! I’ll teach you how to sculpt terrain by diving into all the sources available in the engine, as well as how to create a custom Landscape material that we’ll use to paint highly detailed materials across our island. I’ll even show you how to paint realistic foliage on your levels.
https://dev.epicgames.com/community/learning/tutorials/wlGz/lesson-11-adding-ocean-water-unreal-engine-5-water-plugin