空白广告牌叠进雾里的竖向都市

Portrait 9:16, a cinematic digital illustration: crisp edges, subtle grain, poster-ready polish. A futuristic metropolis climbs the full height of the frame, streets stacked over streets and billboards over billboards, rising into a skyline lost in mist, so the scale and the vertical rhythm come through. One lit boulevard is the focus. Glossy facades and hanging signs along it catch reflected colour and draw the eye upward. The main buildings mix smooth glass, brushed metal and weathered concrete for texture under the neon. Billboards carry no lettering on purpose, only clean abstract shapes and lines that still read at a glance on a screen. Foreground in the lower third is shallow in depth, with a crisp billboard in front; above it, layers fall off moderately into soft mid and far planes. Gentle rim light carves the forms while the colour drifts from cool to warm: inky indigo into electric magenta with coral highlights. Shoot slightly low and tight so the climb feels steep, and keep balanced empty space along the outer edges. A single hovering drone and a far-off ribbon of transit suggest motion and city circulation without crowding the picture.