Click Image ---> Adjustments ---> Treshold. 移动 a little cursor to increase/decrease visibility.
Click on your background image on the panel on the right and instead of normal choose screen,lighten 或者 similar.
Before 你 do that, 你 need to unlock background layer. You're going to do that 由 double clicking little lock on the background layer. Then add textures.
In this Elena photo, I used a link link 发布 to this spot.