Work of Photoshop again. Well, may be it's just I've gain technical knowledge. So, I could see such details of posters where they went wrong. Here, in this poster, seems like they captured each in studio individually and then placed it at one place with some levelling up hue and saturation. You can see all the fake and unnatural skin tone as they've filtered it. Meh. Hardly, you see a natural poster nowadays, leave creative apart.