Maintaining his reputation as a sophisticated filmmaker fostering an obsession with human suffering, co-writer/director Alejandro Gonzalez Inarritu unleashes another torrent of self-loathing and psychological flight with “Birdman or (The Unexpected Virtue of Ignorance),” presenting himself with a firm technical challenge to match the screenplay’s exhaustive reach into the banalities and pressure points of an actor on the edge. The picture is certainly an achievement, with winding cinematography and a captivating, face-rubbing performance from star Michael Keaton, but it’s also showy work, persistent in its effort to remind the audience that they’re watching intricate craftsmanship, not necessarily an intimate study of a mental breakdown. Read the rest at Blu-ray.com