Complex sentence: In fact, as "Chris H.", was an early participant in the nebulous Hexagon Sun collective from which BoC emerged, and a collaborator with the group until approximately 1995: he appeared on the "Twoism" album, reissued by Warp in 2002.
Split into simpler sentences: In fact, credited as "Chris H.", he was an early participant in the nebulous Hexagon Sun collective from which Boards of Canada emerged, and was a collaborator with the group until approximately 1995. He appeared on the "Twoism" album, reissued by Warp in 2002.