This wonderful artist has walked me through drawing a very realistic drawing. But, when she gets to 2:52 through 2:59 of this video, I get lost. Where is the info that she gives put in to create that effect? I'm new to photoshop, but I love it! and would like to complete this drawing. Here's the link if someone can help me:

http://www.youtube.com/watch?v=IQJs-Vlv4dw