That, however, is the only time in the movie that Cameron uses 3-D to conjure a comin'-at-ya View-Master effect.

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It looks kind of like a View-Master, but instead of sliding paper filmstrips into it, the viewer snaps onto your iPhone or iPod touch.

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Hundreds of backgrounds are ready to go, among them depictions of a fish, a skateboarder, a View-Master, a leaf, a lovable monster, a Polaroid camera, a high-heel shoe, a head-banging rocker and a kissing couple.

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