If two dudes quarrel in the woods … do they make a sound? Director David Gordon Green has graciously stepped back from making underachieving R-rated comedies to give us what could end up amounting to an underachieving R-rated comedy, but in truth offers a good deal more.

“Oblivion” is so visually crisp and clean that you could actually brush your teeth with it. Director Joseph Kosinski, who pieced together the aesthetically immaculate “Tron: Legacy” takes a similar approach in adapting his graphic novel for the big screen, and with some solid screen writing help, “Oblivion” feels especially worth of the “science-fiction” label.