An artist herself, Kimmie Sowter is full of enthusiasm for the work, and it rapidly becomes clear that at Weta this is as essential as actual talent. One of the first items we see is a finely detailed plan for a raygun from the movie District 9, numbered version 458. She shows us a fully finished alien suit that was never used; and tells us that a typically vague Peter Jackson instruction - "I want an orc" - can lead to 500-plus drawings before the artists crystallise his vision.
The production of the props and costumes also involves an exhausting amount of physical work: the two men in charge of assembling the 250 million plastic rings for the chain mail in the Lord of the Rings movies actually wore away their fingerprints. Never mind that items might be on screen for a matter of seconds, or at a distance, everything is finished perfectly. Most of the tour members are fans of the various movies, but even people to whom The Hobbit is literally a closed book are fascinated by the level of workmanship on display. Sauron's suit of armour, for example, is a work of sinister beauty, its gleaming metal, chased with intricate designs, actually made of plastic for practical reasons: the real metal version, used for close-ups, weighs 70kg.
At the end of the tour, we meet two contracted artists, busy making models and gluing on artificial fur, strand by strand: they're a changing exhibition, depending on Weta's work schedule. "Richard Taylor would love to be in here every day, sculpting and creating," says Kimmie. After only 45 minutes, we can understand the compulsion.
CHECKLIST
Getting there: Air New Zealand flies direct from Auckland to Wellington, with up to 23 return flights daily. Inflight product choices include; Seat, Seat + Bag, Flexitime and Flexiplus.