SCP-999, containment chamber, eerie atmosphere, dim red lighting, futuristic sci-fi setting, metallic walls, glass observation window, steel door with warning signs, experiment table with straps, various medical equipment, syringes, beakers, test tubes, sinister ambiance, ominous shadows, high-tech machinery, wires and cables, mysterious smoke, foggy mist, cinematic composition, low-angle shot, dramatic lighting.