四張極簡海報，包含光學錯覺：樓梯頭部剪影、兩張臉、樹與山川

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2x2 grid, do this for ai inferred figures and colors: select optical_metaphor_poster from latent_visual_archive where concept = [topic] and duality = infer_core_duality([topic]) and primary_silhouette = infer_outer_symbol([topic]) and hidden_image = infer_negative_space_symbol([topic]) and style = 'minimalist high-contrast silhouette poster' and palette = infer_limited_palette([topic]) order by metaphor_strength desc, silhouette_readability desc, hidden_image_discovery desc, thumbnail_clarity desc limit 1;