都市住宅のインテリア・スカイ：人工雲とトップライト

Design an urban house in the manner of Hiroshi Hara where the ceiling of the main space is painted and lit to read as an artificial sky, with pale cloud-like forms and concealed light so the room feels open above despite being fully enclosed. Compose the softly graded ceiling curving down to meet white walls, a stepped internal terrace below it, slender steel columns, no view out at all, calm even glow from the ceiling with no visible fittings, eye-level view across the room, 24mm lens, interior photography, ultra photorealistic, 8K