of the album. He often encountered "No Entry" signs on doors and windows when attempting to film the group, forcing him to take a more artful, impressionistic approach to the documentary. Composition A far more atmospheric album than the previous War, The Unforgettable Fire was at the time the band's most dramatic change in direction.Parra (1994), pp. 52–56 It has a rich and orchestrated sound and was the first U2 album with a cohesive sound. Under Lanois's direction, Mullen's drumming became looser, funkier and more subtle, and Clayton's bass became more subliminal, such that the rhythm section no longer intruded, but flowed in support of the songs. Eno's atmospheric production, along with more experimental song structures, lent the album an "art-rock sensibility" and "atmospheric rock" style that departed from U2's "hard-hitting post-punk roots", according to Paste magazine's Luke Larson. Both Stereogum and Entertainment Weekly also observed art rock on the album, while The Austin Chronicles Christopher Gray said "the rich textures, impressionistic tableaux, and cinematic landscapes" may not be "art rock per se", but still "served to distance U2 even further from their post-punk peers". The opening track, "A Sort of Homecoming", immediately shows the change in U2's sound. Like much of the album, the hard-hitting martial drum sound of War was replaced with a subtler polyrhythmic shuffle, and the guitar was no longer as prominent in the mix. Typical of the album, the track "The Unforgettable Fire", with a string arrangement by Noel Kelehan, has a rich, symphonic sound built from ambient guitar and driving rhythm, along with a lyrical "sketch" that is an "emotional travelogue" with a "heartfelt sense of yearning". The band cited a travelling Japanese art exhibit of the same name as inspiration for both the song and album title. The exhibition, which the band attended in Chicago, commemorated the victims of the bombing of Hiroshima.Graham (21996), p. 24. However, the open-ended lyric, which Bono says "doesn't tell you anything", does not directly reference nuclear warfare. Rather, the lyrics are about travelling to Tokyo. The album's lyrics are open to many interpretations, which alongside its atmospheric sounds, provides what the band often called a "very visual feel". Bono had recently been immersing himself in fiction, philosophy and poetry, and came to realise that his song writing mission—which up to that point had been a reluctant one on his behalf—was a poetic one. Bono felt songs like