Now for the movie itself. The first fatal decision was to make a live-action film out of material that was born to be anime. The animation of the Nickelodeon TV series drew on the bright colors and "clear line" style of such masters as Miyazaki, and was a pleasure to observe. It's in the very nature of animation to make absurd visual sights more plausible.

Since "Airbender" involves the human manipulation of the forces of air, earth, water and fire, there is hardly an event that can be rendered plausibly in live action. That said, its special effects are atrocious. The first time the waterbender Katara summons a globe of water, which then splashes (offscreen) on her brother Sokka, he doesn't even get wet. Firebenders' flames don't seem to really burn, and so on.

The story takes place in the future, after Man has devastated the planet and survives in the form of beings with magical powers allowing them to influence earth, water and fire. These warring factions are held in uneasy harmony by the Avatar, but the Avatar has disappeared, and Earth lives in a state of constant turmoil caused by the warlike Firebenders.

Our teenage heroes Katara and Sokka discover a child frozen in the ice. This is Aang (Noah Ringer), and they come to suspect he may be the Avatar, or Last Airbender. Perhaps he can bring harmony and quell the violent Firebenders. This plot is incomprehensible, apart from the helpful orientation that we like Katara, Sokka and Aang and are therefore against their enemies.

The dialogue is couched in unspeakable quasi-medieval formalities; the characters are so portentous they seem to have been trained for grade school historical pageants. Their dialogue is functional and action-driven. There is little conviction that any of this might be real even in their minds. All of the benders in the movie appear only in terms of their attributes and functions, and contain no personality.

Potentially interesting details are botched. Consider the great iron ships of the Firebenders. These show potential as Steampunk, but are never caressed for their intricacies. Consider the detail Miyazaki lavished on Howl's Moving Castle. Trying sampling a Nickelodeon clip from the original show to glimpse the look that might have been.