In Part 15 of my Unreal Engine 5.1 Endless Runner series, I add a proper skyline by spawning buildings endlessly on both sides of the running track. I start by duplicating my BP_Floor into a new blueprint called BP_Buildings, then I clean it up (delete the score/speed/extend floor stuff) and keep only what I need—especially the Get Attach Point function so the tiles can chain correctly. After that, I build out the floor width and set up multiple Arrow components as spawn points (SP1–SP6) so I can place buildings across the tile and also mirror them to the opposite side. For the buildings, I use KitBash3D’s free Neo City mini kit and import it through Cargo (the setup is super easy once the plugin is installed). Then I create simple building actor blueprints (BP_Building1, BP_Building2, etc.) and spawn them as Child Actor Components using a Switch on Int driven by Random Integer in Range. I also call out a small mistake I made while recording: splitting transform pins isn’t required here—connect them normally if you want. Finally, I hook BP_Buildings into BP_RunnerGameMode with Add Buildings / Extend Buildings, manage an array to destroy older tiles, and fix common issues like overlapping spawns and gaps by adjusting floor tiles and arrow positions. By the end, the level keeps extending with randomized building variations, giving the runner a believable city backdrop.