The director Richard Linklater is cinema’s reigning king of the chill hang, capable of mining compelling drama from the most blissed-out characters. So I was initially thrown by his choice of subjects for his two latest films, released back-to-back: a pair of real-life visionaries uninterested in following artistic conventions. But taken together, the movies demonstrate Linklater’s interest in probing creative temperaments, including his own. Like his protagonists, the filmmaker went against