The essence of virtual reality lies with computer-based three-dimensional environments. Often termed 'worlds', these conceptual models can be navigated, interacted with and updated in real-time. This Guide to Good Practice is intended for individuals and organizations who are interested in potential ways to use virtual reality within the arts and humanities. It concentrates on the most widely used form of virtual reality today, desk-top virtual reality, which may be distributed and viewed on-line via the World Wide Web. In these systems virtual reality worlds run on users' desk-top computers,...