Nooo, I think it's a texture alignment issue (why is everyone calling it a "scar"?). If it was from the sabre, it would be on the other side as well and would be messing with the rest of the surroundings and not just the skybox.
What is real? How do you define real? If you're talking about what you can feel, what you can smell, what you can taste and see, then real is simply electrical signals interpreted by your brain.