From VRML97 Latest Multi User Developments UC Web Applications Certificate -- July 24 1997. byWojtek Furmanski and Balaji Natarajan, Hasan/Zeynep Ozdemir, Tom Pulikal
World Model is (conceptually) replicated in all clients
In practice, that's not realistic for large worlds as non-scalable
Worlds are chunked into regions of mutual interest and only regions are (dynamically) replicated (not analogy with LW Zones)