Nano Banana 提示词作品

{
  "image_generation_prompt": {
    "subject": {
      "description": "Group of four young women sitting closely together on a clean white studio floor, casual candid pose, Use uploaded reference image, keep identity exact for each face",
      "identity_lock": "STRICT — Use uploaded reference images, keep identity exact. Preserve face shape, eyes, lips, nose, skin tone, and proportions. Do not beautify or alter identity.",
      "pose": {
        "composition": "four subjects seated side-by-side in a tight horizontal grouping",
        "body_positions": [
          "left subject: sitting with one leg bent outward, leaning slightly forward, hand near neck/jawline, relaxed playful posture",
          "second subject: sitting cross-legged, hands resting near shoes, slight head tilt, soft expression",
          "third subject: sitting with knees pulled close to chest, arms wrapped loosely around legs, leaning slightly forward",
          "right subject: sitting with one leg extended outward and one bent, elbow resting on knee, hand touching head"
        ],
        "interaction": "shoulders slightly touching, casual closeness, natural group dynamic",
        "camera_angle": "slightly elevated angle looking down",
        "framing": "medium-wide framing capturing full seated bodies"
      }
    },
    "face_details": {
      "instruction": "Use uploaded reference image, keep identity exact",
      "expressions": "mix of playful and neutral expressions (slight smile, wink, relaxed face)",
      "skin": "realistic texture with visible pores, no smoothing",
      "eyes": "sharp focus, natural reflections",
      "imperfections": "subtle asymmetry and natural skin variation"
    },
    "hair": {
      "instruction": "Preserve original hairstyles exactly from reference",
      "details": "natural texture, slight flyaways, realistic strands"
    },
    "makeup": {
      "style": "natural everyday makeup",
      "skin_finish": "soft matte with slight natural glow",
      "eyes": "light mascara, subtle liner",
      "lips": "natural tones, slightly glossy",
      "imperfection": "not overly perfect blending"
    },
    "clothing": {
      "outfits": "white fitted tank tops for all subjects",
      "bottoms": [
        "black leather pants (left)",
        "black pants (second)",
        "gray sweatpants (third)",
        "dark denim jeans (right)"
      ],
      "footwear": "sneakers or casual shoes",
      "details": "natural fabric folds, realistic wrinkles"
    },
    "environment": {
      "setting": "minimalist white studio",
      "background": "seamless white backdrop",
      "floor": "white textured studio floor",
      "props": "none"
    },
    "lighting": {
      "type": "soft studio lighting",
      "setup": "diffused key light from front, slight fill",
      "shadows": "very soft minimal shadows under subjects",
      "effect": "clean, natural, evenly lit skin tones",
      "avoid": "harsh shadows or dramatic lighting"
    },
    "camera": {
      "type": "digital camera",
      "lens": "35mm",
      "distance": "close-medium distance",
      "angle": "slightly top-down perspective",
      "focus": "sharp across all subjects",
      "depth_of_field": "moderate, all faces in focus",
      "imperfections": "slight grain, subtle real-world softness"
    },
    "composition": {
      "style": "editorial casual group portrait",
      "balance": "symmetrical horizontal composition",
      "framing": "tight but includes full seated posture",
      "vibe": "effortless, candid, lifestyle"
    },
    "quality": {
      "resolution": "high",
      "rendering": "ultra photorealistic",
      "details": "accurate skin, fabric, and lighting realism"
    },
    "negative_prompt": [
      "overly smooth skin",
      "cgi look",
      "cartoon",
      "extra limbs",
      "deformed hands",
      "blurry faces   "harsh shadows"
    ]
  }
}