Kenn goes on to say, "The submarine photos are shot against a blue screen using an Olympus C-4040 zoom digital camera so they can later be cut out using the "magic wand" in Ulead Photoimpact.  I use the "clone tool" which can act as an airbrush if set up right to superimpose the sub composite on top of the back matte.  I have found good back mattes with my CD software and other sources. Some background mattes of the ocean I had a friend take, and other are Naval mattes with aircraft carriers and ships removed."