And the point is that the image you see after the paper is placed there is an image constructed by two images that no longer have any overlap. What you “see” as far as your brain concerned is not so much an image, but a construct of where you are in the world around you. A chameleon is just able to gather information about is surroundings from a functionally wider area, and then their brain process that and they form an understanding of where they are and what’s around them.