In early 2003, A Perfect Circle's official Web site announced that Renholder would be replacing Troy Van Leeuwen as the band's second guitarist. While Lohner did receive production credit on the band's second release, "Thirteenth Step", he had other obligations by the time touring began, and ex-Smashing Pumpkins guitarist James Iha stepped in to fill the void. The most notable reason for Lohner's departure was his obligation to produce the soundtrack of the movie "Underworld". This soundtrack was a collection mostly consisting of tracks written, produced, remixed, and performed by Lohner and his friends in the industry, including David Bowie, TRUSTcompany, Maynard James Keenan, Johnette Napolitano, and others. Lohner worked with Richard Patrick of Filter, Wes Borland of Limp Bizkit and Black Light Burns, and Josh Freese of A Perfect Circle and Nine Inch Nails, in a project called The Damning Well. Only one song, "Awakening", was released by the group on the soundtrack. Another track, "Coward", which originally featured Amy Lee of Evanescence on guest vocals, would eventually be reworked to be included on the debut album by Black Light Burns without Lee's vocals due to collaboration restrictions from her record label Wind-Up.