The sides are solid, like the original game, its actually caulk with a TGA image as the star rail, however there is plenty of high hills etc where some air shoving can occure, and there might even be a chain chomp that goes against the traffic, The Graveyard, might have an SP and MP optional selection, Survival, the map is designed for NPC spawning out of sight of the player, I wanted to make an SP map originally with trigger spawners, and the map would have shifted its maze like walls depending on how fast you were etc eg, if you were doing a good time, the map's internal timer might make the layout shift on the fly, to make the more difficult spawners forced to trigger on you. Rainbow Road N64, first turn: (needs some texture calibrations still)