Artificial Horizon Systems created the vast artificial sky beneath which generations of NEX lived, using refractive structures, orbital light generators, atmospheric projection systems, resonance illumination networks, and synchronized weather technologies. The Horizon produced artificial dawn, daylight, cloud movement, atmospheric transitions, night cycles, aurora-like effects, and the sensation of open space above the megastructure. For many inhabitants who had never seen the true sky of Earth, the Artificial Horizon was not simply infrastructure — it was their world.

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The system was deeply connected to Artificial Weather Systems, the Atmospheric Bio-Core ABC-9, Orbital Vein Systems, Harmonic Resonance Systems, Emotional Networks, and Continuity Synchronization Networks. ABC-9 regulated the atmospheric conditions beneath the Horizon, while orbital and resonance infrastructure controlled illumination, synchronization patterns, and large-scale environmental balance. Because of this integration, the artificial sky reflected the emotional and harmonic condition of the civilization itself: periods of stability brought warm white-gold illumination, calm atmospheric currents, and balanced resonance patterns, while fear and instability produced colder light, distortions, flickering synchronization flows, and fractures across the upper layers. For the ELE-480 Line, the artificial dawn became a powerful symbol of peace, belonging, continuity, and emotional connection with NEX.

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During the collapse of NEX, the Artificial Horizon became one of the clearest visible signs that the civilization was failing. Light patterns fractured, resonance clouds destabilized, orbital illumination weakened, atmospheric regulation lost coherence, and entire regions of the artificial sky began shutting down under the influence of NULLIS, while the FENIX-280 Line struggled to protect the refractive cores, atmospheric stabilization infrastructure, and upper synchronization structures. For the survivors, the Artificial Horizon remained a symbol of both NEX's greatest beauty and greatest fragility: the ability of a civilization to create a new sky for itself beneath a dead world.