Posted by philjord on Feb 05, 2019; 8:24pm
URL: https://forum.jogamp.org/Question-about-Java3D-and-Transformations-tp4039441p4039486.html

In fact I just found some notes I made and one area where thread concurrency must be handled carefully is the BranchGroup addChild and removeChild methods; these are structure update calls and must not be called by 2 different threads.

My solution is to put structure updates into a behavior that wakes each frame and processes a queue of pending updates.