backrooms final level, abandoned office space, eerie atmosphere, fluorescent lighting, flickering, yellowed walls, stained carpet, maze-like corridors, no exit, claustrophobic, scattered papers, old furniture, rusted filing cabinets, dimly lit, ominous silence, sense of being watched, distorted reality, surreal, long shadows, 3/4 perspective, wide-angle lens, soft ambient light, desaturated colors, horror theme, psychological thriller vibe.