The Subterranean Fortress: A Photorealistic Underground City

Photorealistic 3D render of a colossal fortress carved into living rock, dominating an underground city. The scene is lit by torch sconces and bioluminescent crystals along damp basalt walls. Grand fortified gates with an iron portcullis, a heavy drawbridge spanning a chasm over a subterranean river. Towers rise from stone, crenellations, connected by arched stone bridges. Surrounding city features winding tunnels, market niches carved into rock, steam vents, copper pipes along the ceiling. The air is cool and moist, with a light mist and rays of light piercing fissures. Textures of wet stone, moss, and soot-streaked metal; color palette cool blues and greens with warm amber torchlight. Cinematic composition, high detail, depth of field, slightly low vantage looking up at the fortress to emphasize grandeur; photorealistic lighting and reflections on wet surfaces.