Magnolia Pictures has spent mid-six figures for worldwide rights to Lynn Shelton’s “Humpday,” a lo-fi buddy comedy that attracted six offers and a protracted bidding war.Film stars Mark Duplass and Joshua Leonard as two straight best friends who decide to film themselves having sex for an art project. Pic preemed Friday in the Sundance Film Festival’s competition section. An unorthodox release plan will see Magnolia launch the pic on VOD before an August theatrical opening, much like their release of the crime pic “Flawless” starring Demi Moore. The company plans to sell international rights. The deal was negotiated by Josh Braun and Kevin Iwashina of Submarine on behalf of the filmmakers with Tom Quinn and Eamonn Bowles from Magnolia Pictures.