A system (10) for compositing a scene comprising a captured video image and a computer-generated background image, the system comprising: at least one video camera (12, 14, 16) for recording and storing a raw video image (22, 24, 26) of a scene and for outputting a working video image of the scene; a selector switch (20) operatively interposed between each of the video cameras (12, 14, 16) and a real-time compositor (18) for feeding a selected one of the working video images (22) at any given time to the real time compositor (18); the real time compositor (18) being adapted to incorporate a first CGI image (28) into the selected working video image (22) and to display a composite video image (32) representative of the final shot on a display screen (34); the system (10) further comprising: a data storage device (41) adapted to store an archive copy of the raw video images (22, 24, 26) from each of the video cameras (12, 14, 16) and a second compositor (30) operatively connected to the data storage device (41) for superimposing a second CGI image (62) onto any one or more of the video images captured by the video cameras (12, 14, 16), wherein the first CGI image (28) is a lower-resolution, or a simplified, version of the second CGI image (62).