Elegance Unveiled: A Staircase Tale prompt

a subject descending a grand, sweeping marble staircase, captured with a subtle, elegant motion blur. The subject wears an extravagant, voluminous gown of black tulle and feathers, trailing gracefully. Natural, cold blue ambient light streams through unseen high windows or archways, subtly illuminating the opulent hall as if by moonlight, casting long, dramatic shadows that enhance the mystery. Shot on an 85mm lens at f/1.8, creating a shallow depth of field that delicately isolates the subject against the majestic architecture. This professional photography captures high resolution, detailed textures of the gown and environment, with a sophisticated, natural color grading lending a film-like quality to the photorealistic image.