This Unreal Engine 5.4 video is about building the foundation for a simple level, which includes building the enemy path and locations where towers can be built.
We start by setting up the environment to easily place evenly spaced out tiles from Kenney’s Tower Defense Kit. Next, we set the size for our level, and draw the Enemy Path, and then fill in the rest with some basic hill tiles. Lastly, we replace some of the hill tiles with dirt tiles, to signify where Towers can be built.
Kenney’s Tower Defense Kit - Tower Defense Kit · Kenney
https://dev.epicgames.com/community/learning/tutorials/1wGl/unreal-engine-04-building-a-level-foundation-let-s-make-a-tower-defense-game