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The results show that our output-sensitive level-of-detail rendering system is capable of visualizing a 3D dataset with an aggregate size of more than 14 billion points at interactive frame rates. The system design in this exemplar application results from close exchange with a small group of potential users: archaeologists with expertise in rockart. The system allows them to explore the prehistoric art and its spatial context with highly realistic appearance. A set of dedicated interaction techniques was developed to facilitate collaborative visual analysis. A multi-display workspace supports the immediate comparison of geographically distributed artifacts. An expert review of the final demonstrator confirmed the potential for added value in rock-art research and the usability of our collaborative interaction techniques.<\/jats:p>","DOI":"10.1162\/pres_a_00297","type":"journal-article","created":{"date-parts":[[2018,5,21]],"date-time":"2018-05-21T18:20:25Z","timestamp":1526926825000},"page":"297-321","update-policy":"https:\/\/doi.org\/10.1162\/mitpressjournals.corrections.policy","source":"Crossref","is-referenced-by-count":20,"title":["Virtual Valcamonica: Collaborative Exploration of Prehistoric Petroglyphs and Their Surrounding Environment in Multi-User Virtual Reality"],"prefix":"10.1162","volume":"26","author":[{"given":"Alexander","family":"Kulik","sequence":"first","affiliation":[{"name":"Virtual Reality and Visualization Research Group at Bauhaus-Universit\u00e4t Weimar Bauhausstra\u00dfe 11, 99423 Weimar, 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