Abstract
Virtual worlds use simulation to create a fully-immersive 3D space in which users interact and collaborate in real time. It is still a great challenge to scale virtual worlds to provide rich user experiences, high level of realism, and innovative usages. There are three unique simulation requirements in scaling virtual worlds: (1) large-scale, real time and perpetual simulations with distributed interaction, (2) simultaneous visualization for many endpoints with unique perspectives, and (3) multiple simulation engines with different operation characteristics. In this paper, we review the challenges in meeting these requirements, present the scalability barriers we observed in current virtual worlds, and discuss potential virtual world architecture and solutions to address the challenges and overcome the barriers.
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