Hello, ho iuse multi thread with jmonkey ?
exception occurs:
Scene graph is not properly updated for rendering.
State was changed after rootNode.updateGeometricState() call.
Make sure you do not modify the scene from another thread!
thank 
You read the docs.
Go here: https://wiki.jmonkeyengine.org/legacy/doku.php/jme3
Scroll down to here: https://wiki.jmonkeyengine.org/legacy/doku.php/jme3:advanced:multithreading
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