1. A method for generating images to be viewable on a display using a computer that are generated based on scene geometry obtained from computer-readable storage and animation data representing changes over time of elements of the scene geometry or other image sources, wherein the images so generated are expected to be used where cross-over is present, cross-over being the illumination of one portion of an image by light intended for another portion of the image or another image, the method comprising: determining a desired one or more images to be displayed; determining, from the desired one or more images to be displayed and/or characteristics of a display system that is to display the images, what image cross-over might be present; determining one or more compensated images representing an inverse of the images and cross-over such that the compensated images are calculated to result in approximately the desired images once displayed; where the compensated images include negative light values: a) setting the negative light values to a nonnegative value; and b) using a perceptual model comprising a perceptual weighting function, adjusting the compensated images to reduce perception of the results of the setting step; and storing the resulting images as the images to be displayed.