tutorial
- here is a tutorial for painting a face with alot of detail http://www.ancient-pig.com/main/tut01/tut01_01.htm
- here is a tutorial about painting human skin from scratch http://mediadesigner.digitalmedianet.com/articles/viewarticle.jsp?id=31082
- here is a tutorial on drawing pixel art http://derekyu.com/extras/pixel01.html