An image processing apparatus includes: a working storage section in which computer graphics description data of a storage format in which a computer graphics material can be edited are developed so as to be used for production of an image; an updating controlling section adapted to control a writing operation into part of the working storage section in accordance with derivative information representative of information which describes control for the stored contents of the working storage section; and an image production section adapted to produce a computer graphics image based on the stored contents of the working storage section.