First I cut out the ceiling of the building then I feathered the edge of it .
Next I imported the sky into the picture, because I featered the edge the sky gradually blends into the background. After the sky I imported and resized the image I also drew a picture in grey pen a silloutette of a big person
Finally I added the shadow under the boat to make it look like it is not floating
Exploring the work of others - Jerry Uelsmann