Preparing to do a tutorial on this effect, this action is actually part of the final effect, but the designer decided to do an action. Simple to whoever wants to learn the action. It transforms your image into a pencil drawing. The website, which is in spanish, Diegomattei, was kind enough to share this with us. Make sure to browse through their work and check out this action.

License: Check with Designer

Source: Diegomattei