I work in an IT shop where in our lighter moments we're always trying to doctor up a photograph for comic effect. Some come out better than others, but this one looks so contrived in places as to be absolutely obvious.
You may have found evidence of airbrushing. Hard to say. But what makes the photo questionable is that there are at least three different light sources. Look at it closely.
I've come up with some more for this story I been developing and will have another article on this shortly. Glad others are now carrying on with my work because this will sink Kerry faster than Unfit will.