, it is rendered as i set it as long as its under 10.0f. When I set it higher than 10.0f it is rendered exactly 10 pixels wide. So this seems to be limited. Is this limited in jME, LWJGL or OpenGL and how can I make wider Lines?
Damn it, it is. Found some forum where people have the same problem with plain C++ OpenGL. The solution of using multiple Quads is proposed there ... Well, my Curve has to be quite round and I would have to use many Quads -> performance issue (i guess it would quadruple the number of vertices for a line)?