Hi! I want to make my own object. So, I make obj file in Rhino 3D 3.0. There are two cylinder. One is head, and the other is body. And I open it in PhiBuilder 2.0. But, I can't use button 'Tree' I want make parent-child relationships. But, I can't. I don't know where i have mistakes. Please help me. p.s. Thanks PhilC It is honor that I receive you help.