Affiche de demi-teintes de fenêtre à l'ombre

Turn the input photo into a 3:4 vertical "original photo + shadow-window halftone overlay redraw" poster. The upper part, about 42%–50%, keeps the original photo unredrawn, preserving the number of subjects, identity, pose, action direction, architectural/terrain structure, viewpoint, lighting, and key colors, with only light publication-grade color grading; in the middle, use a restrained warm paper-color boundary without adding corner labels for the original image or AI image. In the lower part, extract a biased, large-scale shadow main form from the photo: people retain accurate silhouettes and actions, animals retain poses, architecture and landscapes distill skylines or main structures, and food and objects distill outer contours and placement relationships. The shadow is made of deep charcoal black, smoky ochre, or the darkest color in the photo, using coarse halftone dots, toner particles, dry-brush edges, localized reverse white, and slight horizontal ink-absorption drag marks - it must not be a smooth vector black block. Overlay 2–5 rectangular observation windows at different scales around the shadow, each window only enlarging a traceable real detail from the input photo, such as hands, eaves, leaves, roads, water surfaces, animal eyes, food texture, or object details. The windows may be offset, intersect, or partially cross the shadow edge, but must not form a nine-grid or regular grid. The lower part uses warm ivory, old rice-white, or light gray paper surface, showing pulp fibers, stains, creases, wear, and old print ink-absorption marks. The windows use low-saturation spot colors extracted from the original image, showing slight misregistration, transparent overprinting, and halftone grain. Keep 25%–40% white space, and add a main title, HALFTONE STUDY, and one observation sentence of no more than 8 English words. No fluorescent neon, flat two-color fills, logos, QR codes, watermarks, or garbled text.