Submerged Steam Locomotive in a Coral Reef

A photorealistic, ultra-detailed 3D render of a vintage steam locomotive submerged in a vibrant coral reef. The train sits on the sandy seabed, overgrown with colorful corals, sponges, seaweed, and anemones. Sunlight filters through clear turquoise water, casting shimmering caustics and light beams onto the chipped blue paint, rust, and brass fittings. Small schools of reef fish circle the wheels as a sea turtle glides by and bubbles rise from the smokestack. The scene blends industrial nostalgia with an underwater utopia, featuring rich textures of weathered metal, barnacles, coral growth, and vivid blues, teals, pinks, and oranges. Depth of field and volumetric lighting create a cinematic, dreamlike underwater diorama.