Comment by JKCalhoun

2 days ago

Not sure which diagonal line you mean but I expect some creases are added for structural reasons, so the large areas of the metal are rigid, not floppy.

Just do an image search for the word "sedan" or pay attention in traffic. It's an exterior panel so I don't think it can be very much structural. Maybe aerodynamics though.

Once you see it you can't unsee it and it starts to look very ugly very fast.