Art car recent years the festival has been forced to limit the number of vehicles on the playa. As such they have restricted the vehicles that are licensed to what they are now calling "mutant vehicles". There has been some confusion within the Burning Man and Art Car communities over these two terms, with some believing the terms are simply synonyms. According to art car artist and Art Car Fest organizer Philo Northrup, art cars are "street-legal vehicles that have been permanently transformed into mobile sculptures". According to the Burning Man DMV ("Department of Mutant Vehicles"), Mutant Vehicles are "'art on wheels':
Cameo glass was in the Art Nouveau period, by makers such as Émile Gallé (1846–1904) and Daum of Nancy, when Roman-inspired subjects and color schemes were totally abandoned, and plant and flower designs predominate. Cameo glass Louis Comfort Tiffany made only a small number of cameo pieces, which were a French specialty in this period, though other firms such as the Czech Moser Glass were also producers. Introduction of glass-working methods by Jesuits resulted in a Chinese form of Cameo glass, Peking glass. As with European Cameo glass, a textured image is created by carving away layers of glass from the core