Things usually mentioned when discussing rock band Sigur Rós: Iceland, glaciers, gorgeousness, elves, cinematic catharsis. Things depicted in the Sigur Rós documentary Heima: all of the above, including the scruffy, cute, elfish band members. A fusion of hardcore nature-porn and sublime, guitar-driven symphonies, Heima (Icelandic for "home") follows Sigur Rós through a handful of shows in their native country with a soundtrack that is more beautiful than a Polaroid of god. (Metro Cinemas, 4500 Ninth Ave, 8 pm, $11.)