We San Franciscans are lucky when it comes to film. To offset the 100-screen multiplexes in shopping malls throughout the region that show whatever big-budget star vehicles Hollywood sends their way, we have numerous second-run and art-house theaters. And to fill these small-scale dream palaces we have as many film festivals as there are weeks in the year — probably more. The 13th SF Independent Film Fest is among the first of 2011. It got under way Feb. 3.