use 3d studio that is what I use. ok This is what I do in 3d studio. YOu make the terrain. then you make the cube. then bend the cube so it looks like a path. then have an interception funtion in 3d studio do the work, but in order to do this you need 3d studio which you can get a 30 day trial if you want, Too get the full version it cost 3.5 thousand which I would call an investment. I would also buy paint shop pro the new version that you can point 3d objects which is another 1 thousand. I know that sounds like a lot of money, but what else are you going to do with it.
Go through yourself at a wall.