pencil sketch

- http://www.escrappers.com/pencilsketch.htm
- http://www.developingwebs.net/photoshop/pencilsketch.php
- Imitation of pencil
- http://www.heathrowe.com/tuts/pencil.asp
- http://www.duckettphoto.com/lessons/pencil/pencil01.htm
- http://www.purephotoshop.com/article/19