I've used it a few times and it's very simple to use with great effect. [Tutorial] Easy Sketch Effect 1) Open Image 2) Duplicate Image (Ctrl+J) 3) Desaturate It (Ctrl+Shift+U) 4) Duplicate Image (Ctrl+J) 5) Invert (Ctrl+I) 6) Blending Mode: Color Dodge 7) Gaussian Blur>1-9 Pixels *I use 9* 8) Finished