The main ideas are to have a textured source and to play around with filters that manipulate the look of sketched-out lines and doodles.Tutorial segments are as follows:IntroductionPreparing the watercolor paper.  (You can download the attached watercolor paper from this segment.)      Applying the watercolor texture.Photo texture part one. ( Our texture photo is a stucco wall.)Photo texture part two.Creating grunge brushes from scratch.Project ( Step by step instruction.) ( You may download the attached instruction sheet.)