The beauty of popular vector-based programs such as Illustrator or Freehand is their ability to create smooth, clean, streamlined imagery that is mechanically perfect. But what if you decide that your resulting work is too clean and sterile, and you want to add a grittier touch to your vector work instead?
Sometimes it's a case of not being sure of where to begin or not having the time, budget or access to the right equipment, such as a screen-printing lab. It's also possible that you have already tried to add texture and age to your work by using filters in Photoshop, but weren't completely satisfied with the results.