Photo to Architectural Sketch Poster

Please create a separate high-end design poster for each photo I upload, without multi-image collages—output each photo individually. Overall, use a 3:4 vertical composition, with the top and bottom sections strictly 1:1 in height, each occupying 50% of the frame. The upper half retains the original photo, preserving the main subject's identity, structure, pose, realistic texture, natural lighting and shadows, and original color atmosphere. Only apply subtle high-end color grading to give it the quality of an art magazine or exhibition image. To fit the frame, you may naturally extend the environmental background, but do not stretch, distort, or alter the main subject. The lower half extracts only the most identifiable main subject, outline, structure, pose, and narrative relationships from the photo, reconstructing them as an architectural concept perspective sketch / hand-drawn architectural proposal rendering. Do not fully retain the scene; do not copy elements from the photo one by one. Actively remove most of the background, props, and irrelevant details, leaving only the core forms, spatial relationships, and visual highlights that best represent the original theme. Rejudge the artwork in the lower half. Even if the original composition is poor, the background cluttered, or the subject small, salvage it through reduction, recombination, cropping, scale changes, and white space to turn it into a cohesive piece. Truly empower the model to redirect and re-envision the frame. The style uses freehand perspective line drafts + minimal selective color blocks. Lines should be loose, restrained, with a slight sense of repetition and pauses. You may retain minimal auxiliary lines, extension lines, construction lines, and geometric reference lines typical of architectural hand-drawing to create a clear sense of design iteration. Use color sparingly in just a few key areas to lightly fill in, emphasizing the main subject, structural layers, local shadows, or spatial focal points—leave the rest unpainted as much as possible. The composition must center on extensive intentional white space. The main subject should be smaller and more refined, with large areas of empty space around it. White space is not mere empty background but an integral part of the composition, working together with the subject, line work, reference lines, shadows, and sparse color blocks to form a sense of breathing room, spatial depth, and rhythm. The subject may be off-center, aligned to the edge, partially cropped, or scaled down; better to underdraw than to fill the frame. You may add minimal geometric shadow blocks to reinforce volume, depth, and spatial hierarchy, but avoid heavy rendering, complex environments, or photorealistic effect vibes. Keep the background ultra-minimal, retaining only the slightest hints of setting where necessary. For color palette, extract 2–4 of the most recognizable and vibrant colors from the upper photo, reorganizing them into a cleaner, more restrained, and enduring sketch palette. Overall, moderately brighten, purify, and desaturate grays, favoring tones like off-white, light gray, warm gray, soft green, pale wood, and light blue-gray as the base, with sparse pops of more vivid but non-jarring accent colors in key spots. Avoid muddy grays, dull tones, overly vintage vibes, or cheap high-saturation looks. Text should intervene sparingly for editorial purposes, with no language restrictions. Based on the subject, location, action, or mood, generate minimal words, short phrases, or annotations that quietly settle into the white space, forming a restrained image-text relationship with the visuals. The overall effect combines architectural concept hand-drawing, free line drafts, geometric reference lines, sparse color blocks, geometric shadows, massive white space, and editorial typography into a sophisticated visual outcome. Avoid retaining full scenes, element-by-element copying, complex backgrounds, full-frame coloring, photorealistic renders, heavy outlines, cartoonish feels, 3D effects, or templated expressions.