How does the rootnode work

How should i approach the rootnode if i throw all my near by surroundings into it will it render things that are behind me thus slowing things down or does it just render what i need and i dont have to worrie

It renders just whats in the camera view, so you dont have to worry. Nodes are a way to organize your scenegraph both logically and visually. Go through the tutorials to get a grasp on how jME3 works, theres lots of info in them.

Ok thats great this engine is so amazing. Thank You