The coloring is very splotchy, though more so on curved surfaces than on flat surfaces, as can be seen in this color image of a color scan of my Likebook Mars:
Conventional solution for this problem is to apply 'dither' to the image: add white noise to the brightness of the individual pixels, randomly chosen from a homogeneous distribution that has the width of one brightness quantum.
Conventional solution for this problem is to apply 'dither' to the image: add white noise to the brightness of the individual pixels, randomly chosen from a homogeneous distribution that has the width of one brightness quantum.