 Alex Funke , who worked on The Lord of the Rings , directed the film 's miniatures unit . These include 1 / 24th and 1 / 100th scale miniatures of Miraz 's castle . A scale model was built of the Narnians ' cave hideouts during the climactic battle , which the actor playing the giant Wimbleweather was filmed against . One of the improvements made over the previous film was to make the centaurs walk during dialogue scenes , so Cornell John as Glenstorm wore Power Risers ( mechanical stilts with springs ) , to mimic a horse 's canter and height . The animatronic Minotaur heads were also improved to properly lip sync , although this was not as successful as hoped and had to be revamped digitally . 
