A detailed fantasy skyship, resembling a manta ray with ventral sails, flies over a mountainous river valley at sunset.

Create a detailed concept-art illustration of an original fantasy skyship designed specifically for flight, not a seagoing ship with balloons attached. The vessel has a broad, graceful manta-ray-inspired hull, with wide swept wings and a tapered forward “head.” The overall silhouette should feel aerodynamic and organic while still unmistakably reading as a sailing vessel. At the extreme forward end of the ship is a fully forward command deck/bridge, positioned at the literal “head” of the vessel. It should project slightly ahead of the main hull and provide excellent visibility in the direction of travel. Do NOT place the command bridge in the middle or rear. The upper surface of the hull has a large, open dorsal deck. This is a practical working deck used for loading cargo, moving equipment, boarding other ships, repairs, and combat. Keep this deck relatively unobstructed. It should feel like the main working deck of a pirate/exploration vessel. The most distinctive feature is the ship’s ventral sail plan. There are two enormous primary sails, one beneath each wing, rather than sails mounted above the ship. They must clearly read visually as traditional sailing-ship sails: heavy canvas, visible seams, ropes, rigging, spars, tension, and fabric that billows naturally in the wind. They should NOT look like airplane wings, mechanical fins, or translucent energy fields. Each primary sail is roughly triangular in shape: * its inner edge is attached along a large vertical Mehr sehen