{
  "mode": "built-in image_gen",
  "prompt": "Use case: stylized-concept. Production 16-frame directional sprite atlas for a detailed 1990s 2.5D pixel-art first-person game in an old American city. EXACTLY 4 columns by 4 rows, uniform square cells, true transparent background, no text, no scenery, no roads, no fog, no rectangles or borders. First eight cells: the SAME worn burgundy 1980s American four-door sedan in eight directions, in this exact order: rear, rear-right three-quarter, right side, front-right three-quarter, front, front-left three-quarter, left side, rear-left three-quarter. Last eight cells: the SAME dull silver 1980s sedan in the same eight directions. Keep consistent car design, wheelbase, scale, silhouette, perspective and ground anchor within each car's eight views. IMPORTANT: common world scale, side views naturally wider and front/rear views naturally narrower; DO NOT enlarge front views to fill the cell width. All wheel ground contact points on the same low baseline; generous fully transparent margin above; whole car visible. Muted rainy-night highlights, solid opaque body, dark transparent-free windows, headlights warm yellow and rear lights dim red, no light cones. Crisp hand-painted pixel clusters, readable panel lines, wheel rims, bumpers, no photographic texture."
}