These are some of my favorite filters. I already told you that I like textures and dirt. Most of the time, I work with my own scanned textures, or paint the dust and scratches, but by working a little with the different options, there's always some time to save. Some of these filters apply random noise to the image or selection (like Hurl or RGB Noise), while others have more selective algorithms which allow you to not only give texture to your image but also give it an impressionistic look while still keeping its colors and forms (like Pick, Slur, or Spread).
Adding Noise can be done by following these simple steps: