Posted by LordSmoke on Feb 03, 2015; 12:22pm
URL: https://forum.jogamp.org/java3d-capture-screenshot-or-rendered-image-tp4033984p4033994.html

And just for good measure, I made sure I upgraded my jogl and j3d to the latest (what I believe to be compatible) versions:

jogl 2.2.4 - 2014OCT10
java 3d - 21014AUG07

same results.