You can import. See :
Is there a easy way to creat the CollisionShape? - #10 by Ali_RS[quote=“MonkeyGroove, post:17, topic:37408”]
-not able to drag and drop materials on models on 3D view or on scene hierarchy display
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You can do that in blender. (But that’s only for phong materials)
If you want more flexible and modern way to create and view your jme-specific material definitions directly in blender using blender cycles system then you may take a look at f3b.