There are two artifacts I don’t quite understand in this video:
The first is that the sun seems to shine through the top of the hill. (Perhaps this is some kind of bloom/flare?)
The second is that the hills don’t actually cast a shadow on the ground at certain distances away from them.
You can easily see the “gap” of sunlight, and the gleam in the “rocks” in the texture, at certain distances.
However, the hills DO cast a shadow closer to me, which is super weird.
Unreal Editor 4.25.1, Windows 10, GTX 1080 Ti, driver version 220.127.116.1187 (445.87)