In part 12 of my Unreal Engine 5 endless runner series, I add procedural environment spawning so the game finally starts looking like a real runner instead of just roads and obstacles. I show you how I pick a few meshes (like water tanks, a tunnel, and a bridge), align them cleanly in the level using a split viewport/top view, and then merge multiple actors into a single environment asset. After that, I permanently fix the pivot (centered and at the start of the road) so these pieces can spawn precisely at runtime. Then I set up an Environment system in Blueprints: a Base Environment BP with a Static Mesh component (no collision), child blueprints for each environment mesh, and an array of environment classes in the GameMode. I create a “Get Random Environment” function and a Spawn Environment event in the Flow BP that spawns the environment at a constant start-point arrow location. Finally, I solve the big problems: environments looking too random (using a repeat count + current environment), preventing immediate repeats (temporarily removing the current class from the array), and handling a special “bridge” piece that spans three road tiles (cooldown to skip the next two spawns). I also fix the bridge popping issue by moving the destroy box further back so the player can’t see it despawn.