Photorealistic Airship Hovering in a Crystal Cave

Photorealistic render of an airship hovering inside a vast crystal cave. The vessel features a weathered brass hull, a large ivory gasbag, and an ornate wooden gondola with rigging of hemp ropes. Soft porthole glow from within warmly lights the cabin. The crystal cave walls and ceiling are lined with sharp, facets that refract light into rainbow prisms, casting shimmering reflections on a still underground pool below. A whisper of fog pools on the cave floor as light rays pierce through the crystalline ceiling, illuminating the scene with cinematic, high-detail lighting. Focus on ultra-detailed textures: rusted brass, carved wood grain, and the angular facets of crystals, conveying a sense of scale and quiet wonder.