Centrum Light, Homeline Dark.

[Johnny1A.2]

Originally Posted by PTTG

And hey, now Vanish settings have been explained. They're worldlines that put up global shield nets.

Another possibility that has occurred to me for some of the Vanish settings: 'loose' timelines. That is, a timeline that is so loosely anchored to its Q that even something as trivial as the arrival of a conveyor pushes it way, way out of its former position, maybe so far out that it's just beyond the range of Homeline/Centrum gear. That timeline might have been Q1 in the moment of your arrival, now it's Q193. As soon as another conveyor (or probably any number of other things) happens, it moves around again.

Such 'loose' timelines could also be used to justify the sudden presence of some really weird, bizarro-alien timeline suddenly appearing in familiar hyperspaces, too. The loose line use to sit out in Q8385, now it's in Q2 and it's really strange.