Whatever information the senses produce the brain trusts as inherently believable. If the sense could not be relied upon, then the world would have been an utterly confusing place. Humans would have been unable to make any sensible choices leading to survival. This is not to say there is no illusion. There is animal camouflage.
Animals use it to fool each other, including humans.
In this way images become processed images, deliberately altered, and may serve to fool an observer whose senses and interpretations are not sufficiently sharp. These are classical exceptions which prove the point, because the basis of success for camouflage and illusion is that humans will believe what they see. Without the human bias toward belief, the media could not exist. What's more, because the bias is so automatic and unnoticed, the media, all media, are in a position to exploit the belief, to encourage you to believe in their questionable sensory information. This bias has commercial value for the media since it allows them to keep your attention.