As an example which realizing has an abstract result, but its meaning is closely linked with the human body (the physicality of the body because of the gravity rules), is the work of Seiko Mikami, “gravicells - gravity and resistance” (2004), Yamaguchi Center for Arts and Media (YCAM). In this work the lines are distributed over the surface of the sensor-fitted floor and the visitor can manipulate their organization. This affects their global appearance. They remove and are rearranged approaching to each other, or move away from each other. In this way they build condensations over the projection surface. Also the visitors are decorated with the projected lines. The pattern reminds on the Moirés which we know from the industry of the drapery, or as the physicists call them ‘interferences’. These patterns appear if one overlays line-patterns, for example as those that emerge if transparent curtains are overlaid. A moiré pattern is an interference pattern created when two grids are overlaid at an angle and also when lines are arranged relative near to each other. The work of Mikami reminds visually in some stages on the work of Thomas McIntosh, Mikko Hynninnen and Emmanuel Madan, “Ondulation” done two years before, in 2002, which creates an analogy between the waves of the water and the waves of the sound. An example of early computer-graphic, characterized by interferences is the work “Asymmetrie” (1966) of Maughan S. Mason. (Penesta Dika)