Use the Clone Stamp Tool to fill the upper area with more clouds. Open Photoshop and a sample image that you want to test. At the top of the window go, File>File Info A blank metadata sheet will now be shown. At the bottom select the drop-down arrow which will present you with your various metadata template that you may have. Set the Fill of the layer to 0% and add a Gradient Overlay layer style with the following settings. Return to the Desert Background and add a Gradient Overlay layer style to darken the bottom area of the image.