Im doing some research right now for several different topics, however with this topic, im a little lost. Basically, in most modern rpgs the world seems to just continue without having a level system. However, most of them do have levels but they do a good job on hiding this. What im having a hard time figuring out is this: say theres a case where you can see a city ahead of you. This city is actually another level. You get a little closer and "loading..." then you are right back where you were before loading took place. Logically, what was loaded was the characters and scripts, etc within the city structure. Now, you decide to walk back to the other area and "loading..." (think of half-life). As pointed out, it's obvious what was loaded, however what I can't figure out is what should be deleted? Should the characters you can still visibly see but are just on the opposite side of the loading zone just dissapear. or should the entities that spawned that you didn't destory just be deleted? Now im thinking that the entire terrain can be loaded for the entire scene and so can the various static objects that are used a lot such as trees. Dynamic objects such as npcs can spawn at certain times when triggerd. Now, most rpg's and such do tend to have different worlds. This is the only time all of the old data is flushed and all new data is loaded and is what ill probably have and I guess how the character gets there would be left up to the game designer ;) Im very interested to hear what you all have to say about this. ~Jason