"Trip rock" was also used by Dutch band The Gathering for describing their music since 1999, but as a "trippy" music with strong emotionality and melancholic mood, rather than rock influenced by trip hop.
With their album Blue Lines, Massive Attack are credited with creating the sub-genre trip hop or Bristol Sound which features a more meditational sound than hip-hop which they are associated with. A later album Mezzanine features "eerie atmospherics, fuzz-tone guitars, and a wealth of effects" on many tracks. They called their new approach to their rock music trip rock. Other trip hop bands, like Portishead, often used principally typical rock instruments to recreate their sounds.
Trip rock has also been used to describe groups like Unkle who are a collaboration of musicians featuring trip-hop DJ's including James Lavelle and also a leader in the development of U.S. trip-hop DJ Shadow and rock musicians from various genres. Robert Del Naja from Massive Attack also featured in the later works by the collaboration.