This paper introduces the idea of temporal links, which provide a flexible mechanism for replaying pas t or recent recordings of virtual environments within other real-time virtual environments. Their flexibility arises from a combination of temporal, spatial and presentational properties. Temporal properties determine the relationship between time in a live environment and time in a recording, including the apparent speed and direction of replay.
Spatial properties determine the spatial relationship between the environment and the recording.
Presentational properites determine the appearance of the recording within the environment. These properties may be fixed, dynamically varied by an application, or directly controlled in real-time by users. We also demonstrate applications for adding new content to an existing virtual world, and a VR post-production editor. The Digital Library is published by the Association for Computing Machinery.