I need to show a group of a dozen or so movie posters in an interesting way in one graphic using Photoshop CS5. I've rotated them and added drop shadows/borders to all. How do I add a cloud background? These are high-res images and the canvas is about 6000 px wide, so a raster image probably won't work.
Also, can you give a "3D" effect to the images so they have perspective? Thanks.