 The Orphanage and The Embassy did additional work, with the latter creating a digital version of the Mark I armor.To help with animating the more refined suits, information was sometimes captured by having Downey wear only the helmet, sleeves and chest of the costume over a motion capture suit, and skydivers were filmed in a vertical wind tunnel to study the physics of flying.For shots of the Mark III flying, it was animated to look realistic by taking off slowly, and landing quickly.