Hi, I am Nori, a Masters Student at the University of Connecticut at Storrs. I have been using Java-3d and am experiencing problems identifying the selected object. I am using the PickRotateBehavior and have created a Transform group for each of the objects that I am adding to the BranchGroup. Can I get some insight on how to use PickingCallback or someother method for identifying the object picked. Currently my PickingCallback is getting a null TransformGroup when it is called. I have registered a PickingCallback to the PickRotateBehavior. Regards and Thanks Nori =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".