Photorealistic Alien Cave on a Distant World

Photorealistic interior of a cave on a distant alien planet. Damp, rugged walls with towering stalactites and stalagmites made of glassy basalt and crystalline ore. Bioluminescent fungi and mineral veins glow electric blue, cyan, and emerald, casting eerie light on wet rock surfaces and creating deep, realistic shadows. A shallow underground river winds through the chamber, its iridescent sediment casting prism-like reflections. Strange alien rock formations form ribbed arches; crystals embedded in the walls shimmer with refracted light. Fine dust motes drift in volumetric beams from a crack in the ceiling, revealing an otherworldly sky outside—the planet’s two moons and a faint nebula tinting the horizon with purple, magenta, and teal. The cave mouth offers a glimpse of an alien landscape under an impossibly colored sky. Shot from a slightly low angle to emphasize a towering ceiling, with macro textures on mineral surfaces, realistic wetness, HDR lighting, depth of field, and photorealistic details.