My game was originally written using OpenGL [ES], and thanks to libANGLE, I was able to port my game to Direct3D11 almost effortlessly. Now I have run into a small problem, there is no equivalent in D3D11 to glLineWidth (not even ANGLE supports this; plus the devs explicitly stated it will not be supported). So atm, the best I can do would be to draw a volume line using a triangle strip. The problem is, I'm having trouble wrapping my head around the math required to do it. As stated above, I'm intentionally not using geometry shaders. This is because my game has to support 9_3 for Windows Phone and Surface models that don't support anything higher. And yes, I have been googling this for quite some time now, still haven't quite found what I'm looking for. Any ideas? Thanks.