levels are really just for one of two reasons… 1. just to organize your work, 2. if you want to stream in different levels at different times in the game with BP’s… i generally just have one map, so mine is mainly for organization… but thats not to say that if, down the road, i want to put in a portal to another world… i can still do that too… i don’t think there are any real rules on how you set it up, it’s just a personal choice…