This was Nirvana.You might have heard of them. If not… know that they were huge.It is what Dave Grohl was doing before Foo Fighters and what Krist Novoselic was doing before… whatever it is he does now.A new movie featuring Kurt Cobain has recently stirred the waters of Nirvana nostalgia.24 years ago, Austin photographer Kirk Weddle was given the job of creating the inner sleeve for “Nevermind”, an album that would change the landscape of rock.Shot in a closed Los Angeles swimming pool, here are 18 rarely-seen photos made public courtesy of Austin’s Modern Rocks Gallery…