Photorealistic Submarine in an Ice Cave

Photorealistic rendering of a submarine gliding through an expansive ice cave. Crystal blue ice walls, jagged stalactites, and a translucent ceiling refract diffuse daylight into the frigid water, casting blue highlights on the riveted hull. The submarine's lights glow softly; portholes emit a warm amber glow while bubbles drift upward in the silent, crystal-clear water. The craft navigates a winding passage framed by ice formations and suspended ice crystals, with highly detailed metal textures, reflections on the hull, and realistic water particles for depth and atmosphere. The overall mood is remote, quiet exploration in a frozen underwater cavern.