Electro-industrial is a music genre drawing on EBM and post-industrial that developed in the mid-1980s. While EBM has a minimal structure and clean production, electro-industrial has a deep, complex and layered sound. The style was pioneered by Skinny Puppy, Front Line Assembly, and other groups, either from Canada or the Benelux. In the early 1990s, the style spawned the dark electro genre, and in the mid-/late-1990s, the aggrotech offshoot. The fan base for the style is linked to the rivethead subculture.