That's what I thought. I'm not sure why it is disappearing. I've contacted the creator but nothing is out of the ordinary with him since it is a 3d line and just produces a mesh on creation. BUT never fails until I add an NGUI UI for some reason. Even after I add the UI and then delete it, it won't show the line rendering again in game view only. I have to not save the scene open it up again and it's fine. So something somewhere is conflicting between the two.