Post-metal is closely related to avant-garde metal and has also been associated with sludge metal, drone metal, progressive metal, and industrial metal. Alternative names that have been used to describe the genre include art metal and metalgaze, highlighting its connection to art music and shoegazing, respectively. Contemporary post-metal, pioneered by disparate groups such as Isis, Agalloch, Boris, Pelican, Jesu, and Wolves in the Throne Room, often employs the extreme heaviness of doom metal but has also become associated with shoegazing and black metal. In particular, the recent critical acclaim of Deafheaven, whose fusion of these two genres has been nicknamed blackgaze, demonstrates the growing success of the global post-metal underground.