Prompt
A full-length mannequin in a midnight-blue satin evening gown stands in side view facing right, centered in the right-middle of a wide studio frame. The fitted bodice and elegant skirt read clearly as formalwear. Its pleated fabric train flows leftward along the floor and, without a gap, becomes exactly three small connected passenger carriages; satin folds turn into carriage panels and roofs, tiny dark wheels sit below, and the same line ends in one miniature steam locomotive with a short brass chimney. Keep the gown-to-first-carriage transition plainly visible so the garment's train and railway train are one continuous construction.
Compose the entire mannequin-and-train silhouette as a compact central arrangement occupying about half the frame width: the locomotive and its front sit near the left quarter, the skirt sits near the right three-quarter point, and generous empty studio floor remains outside both ends. A short pair of dark rails supports only the locomotive and three carriages, with both rail endpoints visible beneath them near the middle of the frame. Soft directional light from upper left gives the satin restrained highlights and brings out the small brass and painted carriage details; natural contact shadows rest on the floor.
Surreal fashion-editorial product photography in a 16:9 wide composition. Every part of the mannequin, gown, continuous transformation, three carriages, locomotive and both rail endpoints remains at least twelve percent of the shorter frame dimension inside every border. A seamless pale warm-gray studio field continues evenly to all edges around the contained scene; surfaces are plain and unlettered.