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Abstract-Widespread adoption of smartphones and tablets has enabled people to multiplex their physical reality, where they engage in face-to-face social interaction, with Web-based social networks and apps, whilst emerging 3D Web technologies hold promise for networks of parallel 3D virtual environments to emerge. Although current technologies allow this multiplexing of physical reality and 2D Web, in a situation called PolySocial Reality, the same cannot yet be achieved with 3D content. Cross Reality was proposed to address this issue; however so far it has focused on the use of fixed links between physical and virtual environments in closed lab settings, limiting investigation of the explorative and social aspects. This paper presents an architecture and implementation that addresses these shortcomings using a tablet computer and the Pangolin virtual world viewer to provide a mobile interface to a corresponding 3D virtual environment. Motivation for this project stemmed from a desire to enable students to interact with existing virtual reconstructions of cultural heritage sites in tandem with exploration of the corresponding real locations, avoiding the adverse temporal separation caused otherwise by interacting with the virtual content only within the classroom. The accuracy of GPS tracking emerged as a constraint on this style of interaction.

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Abstract-Continuing advances and reduced costs in computational power, graphics processors and network bandwidth have led to 3D immersive multi-user virtual worlds becoming increasingly accessible while offering an improved and engaging Quality of Experience. At the same time the functionality of the World Wide Web continues to expand alongside the computing infrastructure it runs on and pages can now routinely accommodate many forms of interactive multimedia components as standard features -streaming video for example. Inevitably there is an emerging expectation that the Web will expand further to incorporate immersive 3D environments. This is exciting because humans are well adapted to operating in 3D environments and it is challenging because existing software and skill sets are focused around competencies in 2D Web applications. Open Simulator (OpenSim) is a freely available open source toolkit that empowers users to create and deploy their own 3D environments in the same way that anyone can create and deploy a Web site. Its characteristics can be seen as a set of references as to how the 3D Web could be instantiated. This paper describes experiments carried out with OpenSim to better understand network and system issues, and presents experience in using OpenSim to develop and deliver applications for education and cultural heritage. Evaluation is based upon observations of these applications in use and measurements of systems both in the lab and in the wild.

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This paper discusses how a digital reconstruction of the Scottish capital of Edinburgh around the year 1544 was created and communicated to the public. It explores the development and reception of the Virtual Time Binoculars platforma system for delivering virtual reality heritage apps suitable for use on most smartphones. The Virtual Time Binoculars system is placed in the context of earlier research into mobile heritage experiences, including Situated Simulations (G. Liestøl. 2009) and the Mirrorshades Project (C. Davies et al. 2014). The eventual virtual reality app is compared with other means of viewing the historic reconstruction, including online videos and an interactive museum and educational exhibit. It outlines the historical and technical challenges of modelling Edinburgh's sixteenth-century cityscape, and of distributing the eventual reconstruction in an immersive fashion that works safely and effectively on smartphones on the streets of the modern city. Finally, it considers the implications of this project for future developments in mobile exploration of historic scenes.