— This paper envisions a shared virtual reality system that could handle millions of users and objets. The SOLIPSIS system does not rely on servers and is based on a network of peers that collaborate to build up a common virtual world. Real-time interactions and virtual co-presence are enabled by the means of emissive and receptive fields that determine how avatar kinestesia and multimedia streams are established. We describe here the overall architecture and the main algorithms that make SOLIPSIS conceivable. Keywords—Peer-to-peer systems, Shared Virtual Environments, Shared Virtual Reality, Massively Distributed Systems, Distributed Algorithms, Self-organizing Systems.