Hughes has designed the artwork for nineteen of KMFDM's twenty-one studio albums and all but two of their singles.

[1] All of his work shares a distinct visual style inspired by Golden Age comic artists, Russian Constructivists, Italian Futurists, and woodcut artists.

[2] The design and complexity of the works have varied over time from primarily simple mono- or bi-color motifs (early albums) to highly detailed multi-color schemes (Attak, WWIII).

The remaining cover artwork has been a mixture of photos and work done by other artists.

Most of these singles have been reissued as special edition 7" records (limited to 250 copies each) from March 2008 to February 2010 in a series called 24/7.