From the HUD display inside Iron Man’s helmet, to entire set pieces that had to be designed from scratch by visual effects artists, you’ll be shocked to see how many scenes in Iron Man 3 that were either digitally enhanced, or created from the ground up.
Motion designer and Art Director John Kikens posted this video on Vimeo yesterday. He had this to say about the various rendering projects that had to be completed for the film:
Marvel tasked us with designing all the elaborate 3D head-up displays (HUDs) – a virtual graphical interface that Iron Man sees from within the helmet environment of his armored suits that communicate essential data and statistics ranging from his physical condition to weapon and navigational diagnostics – While putting strong emphasis on the new ultra-high-tech Mark 42 suit, we also delivered upgraded HUDs to match the new suits seen in the film.
Source: First Showing