im pretty sure i have seen this before in jme samples. But i am wondering, how can i display a bounding voume for debugging? thanks.
also what about for viewing a camera frustum?
If you're running a program that extends SimpleGame, press B. There's more keys for debugging (just look in the SimpleBaseGame source).
As for the camera frustum, well, you're looking at it 
thanks for the quick answers llama!
and was afraid of that answer for camera frustum 