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 to Neo-Grec taste and the French Art Nouveau practiced by Émile Gallé, and cameo glass is still produced today. Despite the advantages described above, fragile Roman cameo glass is extremely rare - much more so than natural gemstone cameos such as the Gemma Augustea and Gonzaga Cameo, which are among the largest examples of many hundreds (at least) of surviving classical cameos produced from the 3rd century BC onward. Only about 200 fragments and 15 complete objects of early Roman cameo glass survive. The most famous example of these, and also among the best preserved, is the Portland Vase in