CREATING REALISTIC CLOTHING IN ZBRUSH
In this ZBrush tutorial we'll learn how to create realistic clothing in ZBrush. We'll start by creating our own fold brushes, identifying the tension points of the body, and analyzing external forces and underlying forms through reference and detailed exercises. Additionally we'll go over the seven main fold shapes and how they relate to each other. Then we'll bring it all together to create the clothing for this cowboy character. By the end of the ZBrush training you'll have learned how to create realistic clothing for a character.
You can find the full tutorial at http://www.digitaltutors.com/tutorial/2033-Creating-Realistic-Clothing-in-ZBrush