Nano Banana Pro JSON Prompt for 4-Photo Collage of Moods

{
  "scene": {
    "format": "4_photo_collage",
    "layout": "2_columns_2_rows",
    "aspect_ratio": "3:4",
    "label_position": "top_center_white_text",
    "background": "soft_minimal_studio_backdrop"
  },
  "subject": {
    "identity": "same_girl_from_reference",
    "appearance": {
      "hair": "{argument name="hair style" default="dark_brown_high_ponytail"}",
      "skin_tone": "{argument name="skin tone" default="warm_tan"}",
      "features": "same_face_structure",
      "accessories": ["{argument name="accessories" default="gold_hoop_earrings"}"],
      "outfit": "{argument name="outfit" default="bikini"}",
      "visible_area": "upper_body_chest_to_head",
      "makeup": "natural_glow"
    },

    "style": "hyper_realistic_portrait_photography",
    "camera": {
      "lens": "85mm_portrait",
      "framing": "upper_body_close_up",
      "lighting": "soft_diffused_beauty_light",
      "focus": "sharp_on_eyes_and_face"
    }

  },
  "photos": [
       { "mood": "{argument name="mood 1" default="ANGRY"}", "expression": "{argument name="expression 1" default="tense_brows_narrowed_eyes"}", "label": "Angry" },
   
    { "mood": "{argument name="mood 2" default="DEPRESSED"}", "expression": "{argument name="expression 2" default="downward_gaze_low_energy"}", "label": "Depressed" },

    { "mood": "{argument name="mood 3" default="FLIRTY"}", "expression": "{argument name="expression 3" default="half_smirk_head_tilt"}", "label": "Flirty" },

    { "mood": "{argument name="mood 4" default="LAUGHING"}", "expression": "{argument name="expression 4" default="open_mouth_genuine_laughter"}", "label": "Laughing" }

  ],

  "render_style": {

    "detail": "micro_skin_texture_hair_strands_realistic_shadows",

    "color_grade": "natural_skin_tones_high_dynamic_range"

  }

}