Java3D psuedo transparent window hack.
Java GUI API's (AWT/SWING) or Java3D does not provide transparent windows or shaped windows like other platform specfic API's like X/Motif or MS Windows API.
This is a hack for a psuedo transaprent window using Java Robot API to do a screen capture and using it as the background on the Java 3D wiew on a JWindow created without any window decorations.