Question: What member of Porcupine Tree collaborated with Dirk Series to create Continuum?

Related documents: [0]  [DOC] Porcupine Tree were an English rock band formed by musician Steven Wilson in 1987. The band began essentially as a solo project for Wilson, who created all of the band's music. However, by 1993, Wilson desired to work in a band environment, and so brought on frequent collaborators Richard Barbieri on keyboards, Colin Edwin on bass and Chris Maitland on drums as permanent band members. With Wilson still in charge of guitar and lead vocals, this would remain the lineup until 2001, when the band recruited Gavin Harrison to replace Maitland on drums. [END] 
[1]  [DOC] Continuum is a collaborative ambient and drone music project between Bass Communion (Steven Wilson of Porcupine Tree) and Dirk Serries (of Vidna Obmana and Fear Falls Burning). The project looks to expand on the artists' "collective ambition and vision, motivated by their immense passion for a wide-range of musical styles, ranging from spacious ambience to pounding doom metal." [END]  
Answer: Steven Wilson
Steven Wilson