I am starting a book and need some assistance. I am by far not new to photoshop but need help with something. I am trying to turn a color photo into a sketch. Now I know how to do that, its easy. I need to know how to make the mids and shadows look like actual shading. like crosshatch. can I fill with a certain brush stroke? help please and I can show you a photo of what I am trying to do. thanks all for having me!