This tutorial will show you how to make trucks (and other vehicles) move in maps, it covers everthing from booting up the editor to playing it ingame. The file also contains a map in game and editor formats for you to look at if needed.
I'm not saying this is the correct way, best way or only way, just MY way of making terrains. They work well and are fast to make, other people may do it a different way but I hope this is somewhat useful for those that need some tips.
Well isn't that frustrating? You try to make your first ever tunnel, you have high hopes for this, it sees to be all lined up correctly, not too sure about the depths, but hey you can check those when you load the map in-game. So you save it, export it, load it, you see the tunnel entrance… you step into the tunnel… NNNNNOOOOO! You only see one section but u walk through and… huh?!? It's the next piece but you can't see other pieces - just blackness.