Mixed Media Pastel Collage Poster prompt

Turn each photo I upload into its own separate high-end design poster... Use a 3:4 vertical layout, with the top and bottom sections at a strict 1:1 height ratio, each taking 50% of the frame. The top half keeps the original photo... For the bottom half, first understand the most memorable core theme of the original photo... then reconstruct it as a pastel hand-drawn doodle and mixed-material collage illustration with vintage paper texture... For the color palette, extract the 2-4 most vivid, approachable colors that best represent the spirit of the photo above and remix them.