Hi there,
I am currently trying to get to grips with jme3 and how to achieve what I want. Running tests and reading code helps. But sometime I am at a loss to understand what a test ist supposed to show.
Please don’t get me wrong, I think that you are doing a great job, and getting things of the ground with JME3 is a lot easier than with jme2, as I only have limited time taken so far, and got further with '3 than I ever got with '2. Also the tests are helping me see what can be done with JME.
But the code/javadoc comments are severly lacking. I am perfectly willing to wade through code to learn what a lib does, but some pointers would be greatly appreciated.
I have made a short video of two tests.
The first is jme3test.texture.TestCubeMap. Is it supposed to blank out on a certain spot (to the rear of the original view position)?
See: http://www.youtube.com/watch?v=fY3avp_E7qQ
The other I found, while reading through the forum, has already been mentioned:
The second is the jme3test.effect.TestEverything. Is the dark field to appear like that? What is the effect that supposed to be tested.
See: http://www.youtube.com/watch?v=qlHvZAHOrQk
Discussed in this thread: http://www.jmonkeyengine.com/forum/index.php?topic=14538.0
Thanks for any hints on what the test are supposed to show
BTW. I am trying to do ambient light as well as a skybox from six seperate images, in case you are wondering. 
mfg lutz
I am not sure what's going on in the 1st issue, I never saw that happen in my tests.
For the 2nd issue, it is a known bug that happens when HDR and shadows are used together:
http://code.google.com/p/jmonkeyengine/issues/detail?id=179
I can confirm the first issue. It's the same for me.