A Question

How do you make tunnels through terrain without the coaster riding right through the terrain.

you need to be skilled in making 3ds and you then need to make your ground with the tunnel there with the original ground far out the way.

best thing to do is find a track with a tunnel as such and look at how it is constructed using the 3ds.

hope this helps, if you need more help ask for some from a 3ds maker

look at my "shiekra" ride, its a good example of how its done, its not how good you can make it look, but its an example of how to do an underground tunnel, just make a flat 3d that looks like the ground... youll see when you ride it, and drop a rate if you want