Band preload (see LODGroupRegistry.preloadNeighbour): the level a group is
making resident, hidden, while its selector metric sits in the band of the
threshold between it and the displayed level. sawReady records that it
landed during this visit, so a release under VRAM pressure is not followed by
a reload while the camera stays put (load → evict → load …).
Band preload (see
LODGroupRegistry.preloadNeighbour): the level a group is making resident, hidden, while its selector metric sits in the band of the threshold between it and the displayed level.sawReadyrecords that it landed during this visit, so a release under VRAM pressure is not followed by a reload while the camera stays put (load → evict → load …).