Abstract: Apparatus for generating an image for digital scene simulation, the apparatus comprising a first store for storing address data defining the three-dimensional shape of an object, a second store for storing video data defining the two-dimensional surface detail of the object, a matrix circuit for manipulating the address data to move the object (by translating it, changing its orientation, or both translating it and changing its orientation), a perspective transformation device for perspective tansforming the manipulated address data to form transformed address data defining a two-dimensional image of the object after the manipulation, and a third store in which the video data is written, under control of the transformed address data, in the form of output video data defining a two-dimensional image of the object after the manipulation and with the surface detail.