Quote Originally Posted by Richard Boutwell View Post
The way I was taught, and the way I have made collages in the past was to position the pieces like you've shown, and then cut away the lower each print where the upper print overlaps so each piece fit right into each other on one final "layer". It is much cleaner than having prints sitting on top of each other, and there is no possibility for the edges to lift. I am a huge fan of rubber cement in collage applications.
One might even consider cutting the upper and the lower photograph simultaneously to gain better fit.