Cell IDs are used to distinguish cells, or locations that make up the playable game world. As the player moves around, cells are loaded and unloaded from the game to save on memory and performance.
Background[edit]
There are two types of cells, Exterior Cells and Interior Cells. Exterior cells belong to World Spaces, and seamlessly join to one another in a huge continuous landscape. Interior cells have no landscape, and can only be accessed by the player if they are linked to another cell with a load door, interiors can be composed of multiple cells broken up by load doors or exist as one large cell.