THE photograph of two skinny, half-naked 20-somethings defined a generation. "Lutz and Alex Sitting in the Trees" was a near perfect evocation of the coun-terculturalism of rave in the early 1990s. The image was so iconic that even people who have never heard of Wolfgang Till-mans, the German artist who shot it, would recognise it right away. The photograph was published in a cool British magazine in 1992, but Mr Tillmans is a hard worker with a prodigious output and he has done a great deal since then.
展开▼