海上都市のタワーユニット：円筒コアとポッド

Design a floating city tower in the manner of Kiyonori Kikutake as a vast hollow concrete cylinder rising from the sea, with replaceable capsule dwellings plugged into its outer skin like barnacles and able to be removed as they wear out. Compose the drum's ring of circular openings, capsules attached at varying heights leaving gaps where units are missing, open ocean on every side with no land in view, a service vessel far below for scale, flat grey marine light, low view up the cylinder, 24mm lens, architectural photography, ultra photorealistic, 8K