Creating wallpapers is one of the nice thing to do in photoshop. All you need is to experiment and explore everything and let your creativity jump into the next level. For more ideas and learnings here I made a list of 40+ Most Amazing Photoshop Wallpaper Tutorials. These are some of the coolest tutorials in creating wallpapers all around the web. Learn more techniques in Photoshop as you go along on these tutorials.
Create a Spectacular Grass Text Effect in Photoshop