I like being able to overlap images to make the picture look as real as possible. For this task, I used the magnetic lasso tool for the clouds and the plane, and brought it into the skyline picture. For the two clouds to look like the exact same, i flipped one of them horizontally so they looked like two different clouds. Then using different layers in a certain order, I set up the images where I wanted them to be. After they were in the right positions, I scaled down the pictures to make them look like the size they would really look flying over the city.