OMG! I just jizzed in my pants, I really think this is a great leap from the old mapping system, damn fine work guys...gonna have to get back into mapping to figure this all out, maybe I can, just graduated highschool so I got 2 months of doing nothing.
So the .bsp kind of works as a link, when it is seen it automatically lets the new map files load? hmm...
I've got an idea, it's quite farfetched, but i'm not fimiliar with this new system and how it works, but I guess it's worth a try anyway
The map size can be greatly increased now, so it enables space for many new features. This will probably require alot of programming which might get very complicated and I don't even know is possible. Let's say you have a map of a planet like namek for example, what if you create a system that you make the whole planet, but then you have a center point of gravity (in the middle of the planet ofcourse) and it works like an axis.
So when you are flying straight you will automatically fly around an angle which is parallel to the center point of the planet, so then you would be able to fly right around the planet and meet up at the same spot without having to change direction at all. If it doesn't make sense, here is an illustration:
Hope you understand what I am saying and happy mapping!