In this engaging and fun lesson, students take a photograph of a city skyline and manipulate it with Photoshop to create an amazing underwater Atlantis-like city. This project takes several days to complete, but covers a large variety of Photoshop tools and techniques including creating and modifying layers, working with adjustment layers and clipping masks, adjusting layer blending modes, making and editing selections, editing gradients, adjusting the canvas size, changing layer opacity, creati