Inspiration for the pressure-suited Umbaran soldiers include the Zentraedi from Robotech and the Sardaukar from David Lynch's Dune.The helmets feed the Umbarans a potent gas mixture that keeps them amped up for combat, increasing their reflexes and aggression. From a production point of a view, such a helmet allowed a single animation model to be created for the military, while keeping the soldiers living, breathing non-droid opponents for the clones.

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