http://www.vernissage.tv | As the tenth work in Tate Modern's annual series of Unilever commissions, Polish artist Miroslaw Balka installed a enormous steel container filled with â darkness. The sculpture, called How It Is is 30 meters long, 10 meters wide and 13 meters high and completely dark inside. The interior walls of the steel chamber are lined with a soft flock that is 10 times blacker than normal black paint.