I have a photo I want to use for a cover with reverse text (white text on dark background). The problem is the photo was taken during the day and I need to darken the background as if it was sunset to put the reverse text on top of it. I have one subject in the photo offset to the far right and want to place the text on the left of the subject. Before I screw up the photo, I want to ask, can I make a cutout of the subject and then darken the original photo and put the cutout back on top where it was, so that the subject looks like he did during the day with a darker background? Will it be obvious to the readers what I did? Subject is out of town now on vacation and it could be a week or so, before I could reshot this closer to sunset.