Helmed by legendary hip-hop/metal producer Rick Rubin, Vol. 3: (The Subliminal Verses) saw Slipknot incorporate new elements into their sound, including the prominent use of acoustic guitars and more traditional song structures. To illustrate this development, percussionist Shawn â€œClownâ€ Crahan devised a new disguise for the group: the stitched-leather Maggot Mask. Appearing both in the promo video for the single Vermillion, and on the album cover, the Maggot Mask was in part a recognition of the nickname Crahan had given the band’s fanbase. It remains one of the most popular pieces of Slipknot merchandise.