Titled in tribute to the early-Seventies German proggers of the same name, Blackwater Park marked the first time these Swedish death-metal virtuosos gave full reign to the progressive tendencies that had long lurked in their music. With Porcupine Tree's Steven Wilson producing multi-movement excursions like "The Drapery Falls," "Leper Affinity" and the misanthropic 12-minute title-track climax, Opeth leader Mikael Åkerfeldt infused the melodic, atmospheric aspects of King Crimson and Pink Floyd with Opeth's complex, dark riffs and his own sepulchral growl.