Review B4: the Stormwind window split changed the default image with no switch. New cvar daylightWindowSplit (default 1 = merged behaviour, a future High-only preset member), bridged to daylight::set_window_split. Review B5: each settled exterior torch slot is keyed by the resident tiles whose footprint reaches its sphere (terrain_torch_generation_near), not a global stamp that re-rendered every slot on any stream event. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>