Celestial Compass in Subterranean Tunnels

Photorealistic close-up of a celestial compass embedded in the damp, mossy stone wall of an ancient underground tunnel. A large brass compass rose with a glass cover, its dial etched with a detailed star map and faint constellations. The needle points toward a bright celestial reference. Surrounding tunnel is narrow and damp, with rough-hewn rock, dripping water, and creeping moss; stalactites hang from the ceiling; pale beams of light sieve through cracks, illuminating dust and catching on the glass and brass. Bioluminescent fungi along the walls emit a cool blue-green glow, creating moody, otherworldly lighting. Hyper-detailed textures: weathered metal, etched engravings, wet stone, water droplets, and subtle reflections in the glass. Cinematic, hyper-real lighting, macro detail, 4K quality.