So I am ruining my 1,000 perfect posts to post this because this is the best stuff I have ever done in school and I will proudly say it was me. First off Obama is an action star! Then he decides to go to a more comedic approach (I think he done did well) (He also tried to copy Jim Carrey's everything) And finally he decides that he is better on as an action star!
having spent a considerable amount of time in Photoshop (in a class similar to what you described) i realize how hard these are to make (at least for me any ways) Nice job i hope you received high marks.
I've spent around 3 years fiddling in photoshop before this class so everything in this class was soooooo easy. This project took an hour max to do 5 posters. I didn't show the other 2 because they are terrible xD
The thing i always had the most problems with was hands, in the skyfall one you had to impose obama's hand around a gun. since he's black and I'm assuming the guy who was originally in the picture was white, i feel that was probably pretty tough, for me anyways but i already know ur better than me at Photoshop
Really all it was is add a blank layer, pick a color close to his skin, get your brush tool and I think I did an overlay blending option. That or Darken. It's pretty much just knowing your tools and options and you can do just about anything