Nano Banana 提示词作品

{
  "style": "ultra photorealistic outdoor garden portrait",
  "aspect_ratio": "9:16",
  "resolution": "8k RAW",

  "reference_rules": {
    "use_reference_face": true,
    "preserve_face_exactly": true,
    "keep_hair_color_same": true,
    "do_not_change_eye_color": true
  },

  "composition": {
    "camera_position": "slightly above eye-level, subtle downward angle",
    "framing": "vertical full-body portrait with extra headroom and foreground space",
    "subject_placement": "centered slightly lower to include sky and trees above",
    "depth_layers": [
      "foreground grass",
      "subject",
      "rose bushes",
      "trees and sky"
    ]
  },

  "subject": {
    "pose": {
      "position": "sitting on grass",
      "legs": "one leg folded inward, other bent outward naturally",
      "hands": [
        "one hand behind body supporting weight",
        "other hand resting on grass"
      ],
      "torso": "upright with slight lean back",
      "head": "turned slightly to side"
    },

    "expression": {
      "type": "soft relaxed expression",
      "lips": "closed with slight natural curve",
      "eyes": "looking slightly off-camera"
    },

    "appearance": {
      "skin": {
        "texture": "real skin with pores",
        "finish": "natural sunlight glow"
      },

      "hair": {
        "style": "long loose natural hair",
        "placement": "falling over shoulders and slightly onto back",
        "color": "same as reference image"
      },

      "eyes": {
        "color": "same as reference image"
      }
    },

    "clothing": {
      "dress": {
        "type": "white off-shoulder chiffon dress",
        "details": [
          "elastic neckline",
          "flowy skirt",
          "lace trim edges"
        ],
        "fabric_behavior": "spread naturally over legs with soft folds"
      }
    }
  },

  "environment": {
    "setting": "lush rose garden",

    "foreground": [
      "green grass with visible texture",
      "natural shadow gradients"
    ],

    "midground": [
      "dense red and pink rose bushes"
    ],

    "background": [
      "arched garden structure",
      "tall trees",
      "soft sky visible in upper frame"
    ]
  },

  "lighting": {
    "type": "natural sunlight",
    "time": "midday",

    "direction": "top-left angled sunlight",

    "quality": {
      "shadows": "soft but defined under body and dress",
      "highlights": "clean highlights on skin and fabric",
      "contrast": "balanced medium-high"
    },

    "color_temperature": "warm daylight (5400K–5800K)",

    "realism_effects": [
      "sunlight reflecting on white dress",
      "soft skin highlights",
      "depth separation using natural light",
      "no artificial lighting look"
    ]
  },

  "camera": {
    "lens": "50mm",
    "aperture": "f/2.8",
    "focus": "sharp on subject",
    "depth_of_field": "slight background blur with retained detail",

    "exposure": {
      "balanced_highlights": true,
      "preserve_white_detail": true,
      "natural_dynamic_range": true
    }
  },

  "color_processing": {
    "style": "natural outdoor tones",
    "greens": "rich and realistic",
    "flowers": "vibrant but controlled",
    "skin": "true-to-life warm tone"
  },

  "realism_constraints": {
    "must_have": [
      "vertical composition balance",
      "real fabric folds",
      "consistent light direction",
      "detailed flower textures"
    ],

    "avoid": [
      "overexposed whites",
      "plastic skin",
      "fake HDR",
      "AI artifacts",
      "cartoon effect"
    ]
  }
}