Possible with BitmapText.
I have a class “BitmapText3D”.
Only problem is that you need to keep some distance between text and geometry (in jME3.0 - for jME3.1 I heard there is a little trick - z compare function is available there).
Which jME do you use?
P.S. I might publish that BitmapText3D and also a HoverText3D I wrote a week ago, if you like. It’s really very simple - I made a SDK 3.0 project demonstrating those two custom Text classes…