Gemini Nano Banana Pro Portraits

Overview

This skill provides complete JSON configuration templates for generating ultra-photorealistic portraits using Gemini Nano Banana Pro. It enables precise control over every aspect of image generation, from subject demographics to technical rendering specifications.

JSON Configuration Structure

Complete Template

{
  "prompt_configuration": {
    "type": "Ultra Photorealistic Portrait",
    "style": "Cinematic Reality",
    "resolution": "8K"
  },
  "subject": {
    "demographics": "[Name, build type, complexion]",
    "hair": "[Hair color, style, texture details]",
    "skin_texture": "[Skin details, effects, realism]",
    "facial_expression": "[Expression details, mood, emotion]"
  },
  "apparel": {
    "outfit_style": "[Overall style]",
    "top": "[Top description]",
    "bottoms": "[Bottoms description]",
    "accessories": "[Accessories list]"
  },
  "pose_and_action": {
    "perspective": "[Camera angle/view]",
    "action": "[What the subject is doing]",
    "reflection": "[Any reflections in scene]"
  },
  "environment": {
    "location": "[Where it takes place]",
    "background_elements": "[Background details]",
    "flooring": "[Flooring description]"
  },
  "lighting_and_atmosphere": {
    "lighting_type": "[Lighting source]",
    "quality": "[Lighting characteristics]",
    "mood": "[Overall mood/atmosphere]"
  },
  "technical_specifications": {
    "camera": "[Camera type]",
    "aperture": "[f-stop]",
    "focus": "[Focus details]",
    "render_details": "[Rendering engine and techniques]"
  }
}

Section Breakdown

1. Prompt Configuration

Controls the overall type and style of the portrait.

Fields:

• type: Portrait type (e.g., "Ultra Photorealistic Portrait", "Cinematic Headshot", "Editorial Portrait")
• style: Visual style (e.g., "Cinematic Reality", "High Fashion", "Editorial Photography")
• resolution: Image resolution (e.g., "8K", "4K", "2K")

Examples:

{
  "type": "Ultra Photorealistic Portrait",
  "style": "Cinematic Reality",
  "resolution": "8K"
}

2. Subject Details

Define the person being portrayed with precise physical characteristics.

Fields:

• demographics: Identity, build, complexion
• hair: Color, style, texture, arrangement
• skin_texture: Realistic skin details, effects, conditions
• facial_expression: Expression, emotion, mood

Examples:

{
  "demographics": "Sydney Sweeney, athletic build, fit physique, pale complexion",
  "hair": "Dark brown to black hair, pulled back into a messy high ponytail, loose sweaty strands framing the face",
  "skin_texture": "Hyper-realistic skin details, intense post-workout sheen, glistening with heavy sweat, visible pores, slight flush on cheeks",
  "facial_expression": "Exhaling slightly, mouth slightly open in a 'phew' expression, focused gaze, tired but accomplished"
}