How to Add Texture in Adobe Photoshop CS6
Photoshop CS6 lets you add a lot of interesting textures (which are in the Filter→Texture menu) to your image, such as the cracked canvas effect generated by the Craquelure filter or the pixel effect produced by the Patchwork filter.
You can find other filters on this menu to help you create mosaic effects, add yet another kind of film grain, and create stained-glass effects in your images. But the most versatile filter in this set is the Texturizer. The Texturizer filter enables you to apply various kinds of textures to your images or selections, including Canvas, Sandstone, Burlap, or Brick.
You can select the relative size of the texture compared to the rest of your image by using the Scaling slider and adjust the amount of 3-D relief effect. You can even select the direction of the light source that produces the 3-D look, selecting from top, bottom, either side, or any of the four corners of the image.
If those variations aren’t enough for you, then create your own texture, save it as a Photoshop PSD file, and use that file to texturize your image.
You can find a handful of other filters that allow you to load your own textures, including Rough Pastels, Underpainting, and Conté Crayon.