VMFA movies on the lawn/Moviegoers arrive at the museum last Friday to view another art form — Virginia Museum of Fine Arts’ showing of the 2012 film, “Beasts of the Southern Wild.” It was the first in an outdoor film series sponsored at the VMFA and inspired by its current exhibit, “The Dirty South: Contemporary Art, Material Culture and the Sonic Impulse.” Valerie Cassel Oliver, the Sydney and Frances Lewis Family Curator of Modern and Contemporary Art at VMFA and curator of the exhibit, welcomed the crowd to the screening, which began shortly after 9 p.m.