Voici la traduction en français de votre demande : **Invite de conception d'affiche pour la reconstruction d'une usine**

I will create a separate, high-end design poster for each photo you upload, with no multi-image collages - each photo will be output individually. The overall format is a 3:4 vertical composition, with the upper and lower zones strictly at a 1:1 height ratio, each occupying 50% of the frame. The upper half retains the original photograph, preserving the subject's structure, authentic texture, natural light and shadow, and original color atmosphere. Only a subtle high-end photographic color grading is applied to give it the quality of an art magazine, independent publication, or exhibition photograph. To fit the aspect ratio, the sky, ground, or environmental background may be naturally extended, but the subject must not be stretched, distorted, or altered. The lower half extracts the most recognizable **subject, silhouette, posture, and narrative relationships** from the photo and reconstructs them as an editorial illustration assembled from real, natural materials. Use clearly identifiable leaves, petals, branches, fruits, seeds, grass stems, bark, or dried leaves, directly leveraging their original shapes, textures, color variations, and irregular edges to compose the subject. Do not cut the plant matter into overly precise geometric forms, and do not wrap the plant in an illustration outline; let the viewer both recognize the original subject and clearly see that it is skillfully assembled from real natural elements. The composition establishes order with a simple rectangular color field or paper area, but without deliberately drawing a complete border. The subject maintains a natural inside-outside relationship with the rectangle, with most of it falling within the color field and a few of the most directional parts naturally extending beyond the edge, creating a relaxed sense of overflow - as if the plant is growing out of the layout, rather than posing deliberately to "break the frame." Maintain generous negative space, a clear focal point, and asymmetry, allowing the serendipity of natural materials to coexist with the order of editorial design. Black lines appear only as **minimal auxiliary language**, never as a full outline around the subject. They may be used for eyes, mouths, subtle expressions, small action cues, local connections, short strokes, handwritten marks, or slight visual rhythm within the layout; the lines are thin, loose, and slightly hand-drawn in feel, letting the plant matter itself carry the subject's form and contour. The color palette is drawn from the most vital and recognizable color character of the photo above, then re-expressed through the natural colors of the plant materials themselves. Preserve the true composite color differences of leaves, petals, fruits, and dried branches without over-unifying the dye; the background uses a light or softly blended color harmonious with the original image, making the natural materials the visual center of the composition - fresh, restrained, alive, and not cluttered. Text remains minimal and functions as a lightweight element in the editorial design. Distill a short English title and a few tiny annotations from the photo's mood, action, relationship, or metaphor, which may sit near the edge of the rectangular color field, hover in the negative space, or align subtly with a branch or leaf direction. Do not let it overpower the subject, and do not treat it as a conventional poster headline. The overall visual relationship is **real natural materials × subtle black hand-drawn marks × geometric color field × natural overflow**, maintaining a handmade, intelligent, relaxed, poetic, and high-end editorial feel. Avoid full black outlines, plants cut into regular color blocks, children's leaf-collage aesthetics, forced overflow, cartoonish collage, and templated compositions.