Arias’ angles and compositions are inventive and striking, and most impressively, he incorporates a bevy of live action camera techniques: handheld framing, long tracking shots through corridors, rack focusing and shifting depths of field–that generate considerable immediacy and environmental realism (despite the obvious hand-drawn artifice). More than simple technological advances, these elements have long been untapped by feature animation due to their inability to be storyboarded – they’re traditional luxuries of live action spontaneity. For all the accolades bestowed upon Alfonso Cuarón’s digitally-composited tracking shots in "Children of Men", Arias’ techniques here are arguably greater achievements.