RiME inspired waterfall - Unity version (Amplify Shader Editor) made for guest classes at my uni, see blog for full details/breakdown.

RiME inspired waterfall - UE4 version (older version)

The water 'wrinkle' shader applied to a spline

Simple water caustics effect using a deferred decal in UE4

Animated flag material using vertex displacement and a noise map which pans in world space. Ship model is unfinished. UE4 has a cloth simulation and wind system but it did not look very good in this case and was a lot more expensive.

Simple material that puts a grassy texture on top of the rocks, next to this...

...you can also use vertex colors to mask out the grass completely if you want bare rocks to maximize asset reusability (all on the same material to reduce draw calls).

The grass moves away from the player when the player moves through it. The grass material uses the player location in world space and draws a sphere mask there, which is used to push the vertices of the grass away from the player.

This fog's opacity is based on both the angle you look at it and how far away you are from it to fake volumetric fog. When you move close to or look at the plane from an angle it it will slowly become more transparent to hide the fact that it is a plane.