In GLIMMER 1.0, when two genes A and B overlap, the overlap region is scored. If A is longer than B, and if A scores higher on the overlap region, and if moving B's start site will not resolve the overlap, then B is rejected.
GLIMMER 2.0 provided a better solution to resolve the overlap. In GLIMMER 2.0, when two potential genes A and B overlap, the overlap region is scored. Suppose gene A scores higher, four different orientations are considered.
Glimmer was once a source of power during the Golden Age. Now it is used as the main currency in The Last City, Earth. Glimmer is used to purchase items from vendors in The Last City.