In part 5 of my Unreal Engine 5.1 Endless Runner series, I focus on one of the most important pieces of replayability: obstacles that spawn randomly. I start inside my BP_Floor blueprint by creating a “Setup Spawn Points” function. I bring in the same Lane Position array I’m using in the runner character, loop through it, and generate arrow components so I can visually see exactly where obstacles can appear. Once the arrows are in place, I also fix alignment by shifting the floor and adjusting the arrow and box collision offsets so everything lines up correctly. After that, I build a simple obstacle system using a base BP_Obstacles actor and two child blueprints: a Wall and a Blocker. The Blocker is made from cube meshes with destructible collision, and the Wall uses an imported box mesh with a quick material setup (including a metallic constant set to 1). Then I create a “Spawn Obstacles” function that shuffles the spawn points, picks a random count and a random obstacle type using Switch on Int, and places them using child actor components. Finally, I set up simple FloorTiles for level layout and preview the gameplay—yes, you can slide through the blocker because I disable capsule collision during the slide montage and enable it again afterward.