I just came up with an idea. There are a lot of old tracks which lack details because PCs were slower back then. These tracks could be "updated" easily with some new textures and objects. BTB definitely provides the easiest way to add new stuff, so that's why I came up with this. Is it possible, to export an existing track (with 3DSimED for example) in a way, that the track (road) itself would appear as a path in BTB? I wouldn't even mind to have to add the whole terrain again, but it would be a lot easier, than creating that from scratch.