Robert Rodriguez, director of violent action films like Sin City and Grindhouse, has also made the family-friendly Spy Kids franchise, with a fourth film, Spy Kids: All the Time in the World, coming this August. The latest 3D adventure will include the added dimension of "aromascope," reports New York magazine.
The third installment of the film series also featured 3D in 2003, but this time, Rodriguez will create a sensory experience with onscreen signals to prompt the audience to smell one of eight scents on a special card.
The technology just requires an easy swipe of a finger to emit a scent instead of the scratch'n'sniff version of Smell-o-Vision that John Waters used for the campy film Polyester in 1981.
The film stars Jessica Alba ( Little Fockers), Jeremy Piven ( Entourage, RocknRolla), Antonio Banderas, and Ricky Gervais as the voice of the robot dog.
The story centers on a mother, a former spy, who is forced out of retirement to prevent a villain from stopping time, with her kids joining in the action.
One of the characters in Spy Kids 4 is a young boy with an increased sense of smell due to a hearing impairment - so he has a nose for picking up clues to solve the thriller.
Rodriguez admits there will be some surprises and jokes with the odors, "but I'm trying not to make anyone sick," he told the Vulture column.
The film will be available in 2D or 3D with the bonus aromas free. It releases on August 19 in North America, the UK and Russia, followed by Japan, Europe and Australia in September.
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