Masterpiece painting of bent hourglass sand clock: upper glass sphere of the sand clock has a medieval ship in the sand clock, bottom glass sphere of the sand clock has a castle in the sand clock, the background: mars surroundings, surrealism, airbrush, artwork by jamesjean, artwork by ilya kuvshinov, artwork by wlop, artwork by artgerm, trending on artstation, 8k, concept art, sharp focus, octane render, unreal engine, cinematic,