Deliberately aiming to put Korean animation on the map, [this] is a tour de force blend of CGI, traditional cell animation, miniatures and live footage.
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The result is a soulless piece of product, an ungainly hybrid of sketchy hand-drawn characters in blocky CGI environments, derivative at just about every level.
Most of the action is tedious, and the less you pay attention to the dialogue, the less you'll feel your hand inadvertently twitching as if with joystick.
Los Angeles Times by Kevin Thomas
Like a lot of other Asian sci-fi anime: a stunningly imagined world of the future populated with one-dimensional characters caught up in a trite plot.
The pic plays like one long chase. Nevertheless, fashioned with ultra-sophisticated means, Sky Blue will be a must-see for anime fans around the world.
The Hollywood Reporter by Sheri Linden
Offers proof that the Korean animation industry is poised for the big leagues.
The New York Times by Stephen Holden
Teeters unsteadily between dystopian fable and Saturday-morning cartoon.
The A.V. Club by Tasha Robinson
Sky Blue is never subtle about its images of loneliness and isolation, or in fact about anything else. But as clichéd as its images are, they're still visually and tonally stunning.
This is one beautifully drawn, frequently lifelike piece of anime.