[[File:ChunkBoundary.jpg|frame|A chunk boundary as represented in Create A World
A world in The Sims 3 is separated into Chunks. As players traverse the world, immediate and nearby chunks are loaded, and far away chunks are deprioritised.
|World Description | Layers | Terrain Paints | Roads | Objects | Effects | Lots|
|Cluster Trees | Edit In Game | Brushes | Chunks | Routing|