Wolf, basically, if you want, you can take any picture and drive on it, as long as you can make the pattern file correctly.. but getting the pictures and 'drawing' the terrains and the surroundings is kind of difficult. What I think Jeffrey has done here, is that he's taken a track from some other game and basically converted it to TS track format. If you could draw such a picture from scratch, you could drive on it as well.
Jeffrey, I really like what you have done with these. If only we could somehow combine these awesome terrains with Puna's magnificent track schemes, jumps [for example jumping down a plateau], tunnels and bridges on which the track turns and also [my personal favourite wish-feature for future TS] night driving, then you can just imagine what a great game it would be

Of course track making would be a lot more difficult than it already is, but the fun level will surely compensate
