hah yeah, I'd love to figure this out, it could bring a whole new aspect to my map design. maybe with a model edit, but surely thier is an easier way, if I recall the bridge I saw units moving under was above a gate, the only thing was it was kind of glitchy when you moved units across it. but worked nonetheless. like they would sink down into the bridge into they were on the middle part of it. then be ontop of it. so I am wondering what would make it do that?