[Ahmo]

It can be as random as the module designer wants it to be. Build a thousand tiles for your world map, give em a couple connection rules and you'll see a completely different world map every time. It's up to the module designer to make the tiles, the engine puts them togethor. You can make a map static (the same every time), by defining the tiles location. Or random by according to it's connection settings.

Read the Doc files that came with the game. They explain it a lot better than I can. The initial module is pretty static, with the key locations only spawning in a few different places each time. The full Version is like playdough, you can shape it how you please.