Maya | xGen | Modifiers | Expressions

A year ago I made a few documents on xgen for myself. Basically I don't have much knowledge on expressions or any coding stuff, I usually go through online documents, forums, and collect a little information on xgen expressions, there are really good simple and powerful expressions given by some artists. I thought about sharing all that I have so that it might be helpful to an artist who doesn't have a knowledge on expressions and coding like me.