For interior even exterior walls you can give any area a great look with faux stone or brick look. It's not a easy job, but well worth it in the end. With simple tools like paint, brushes and a sponge you can design any stone or brick faux look you desire.
With painters tape you can create your squares to make a stone wall look. You can also make perfect lines where needed.
Play with colors to get the look you want. You can create the look of your wall any way you wish, you don't need any guides. You also create your grout look, with your painting skills.