connect the building with the shore, four hundred visitors at a time can enter the building and be within the fog mass. Inside the fog, one's normal spatial references are lost when immersed within an optical “whiteout”, and the “white noise” of hissing nozzles. Artistic use of steam fog was pioneered in the collaborative Center Beam artwork by the Center for Advanced Visual Studies at MIT. First shown in 1977 at documenta 6 in Kassel, Germany, it included steam works by Joan Brigham, Otto Piene, and Paul Earls. For Center Beam, a low pressure hot water steam fog became a medium to project lasers, holograms, films and text onto. The Children's Museum of Pittsburgh is planning a new park with a fog sculpture created by Ned Kahn. Set for completion in 2012, the sculpture will be a grid of stainless steel poles outfitted with fog nozzles. Kahn said of the sculpture, "When the fog is on, it will appear like a 20-foot-diameter sphere [] of fog spinning inside the poles." Other contemporary sculptures in which fog is used as a medium of expression are: Harbor Fog, a viewer responsive artwork in the parkland above Boston's Big Dig highway; Cloud RIngs (2006) by Ned Kahn at the 21c Museum Hotel in Louisville, Kentucky; and the interactive landscape of Dilworth Plaza at Philadelphia City Hall (completion date 2013). See also DOVIDs, Diffractive optically variable image device Lumino kinetic art Robotic art Sound art Sound installation References Sculptures by medium Water