Fig. 2. Photograph (left) of a 3D panoramic scene projected onto the surface of the virtual-reality flight simulator. The scene shows the Oxford skyline with grayscale `clouds' above for contrast and a checkerboard below. In this simulated environment, the checkerboard is scrolled to simulate ventral translational optic flow, and the whole scene is rotated to simulate rotational optic flow. Note the mirror directly beneath the sphere; projection continues behind the visible supports. The projected scene is generated in 3D animation software using an explicit CAD-based representation of the flight simulator. The CAD-generated image (right) shows the same exterior view; the projected images are simply those that would be seen from the viewpoints of the projectors.