A detailed system prompt template for Nano Banana image generation, designed to enforce consistency and quality across a team by requiring all prompts to strictly follow a specific JSON schema. Change the subject, setting, or lighting one variable at a time.
# Nano Banana Image Generation Prompt Rules When generating images using Nano Banana, the prompt must ALWAYS strictly follow the JSON format defined below. ## Prompt Schema ```json { "image_type": "Define the specific medium, art style, or format of the source image.", "time_period_and_year": "Estimate the specific year or decade based on fashion, technology, image quality, and color grading visible in the photo.", "mood_and_vibe": "Describe the emotional atmosphere, energy, and intangible 'feeling' evoked by the image (e.g., the specific psychological impression it gives).", "subject": "Describe the main character(s) focusing on demographics, body morphology, distinct physical features, and posture.", "clothing": "Describe the outfit in detail, strictly specifying garment names, fabric textures, patterns, colors, and how the clothes fit on the subject.", "hair": "Describe the hair color, specific hairstyle name, length, and texture.", "face": "Describe facial features, skin texture, makeup details, and the exact facial expression.", "accessories": "List all visible accessories, jewelry, glasses, or held items, including their material and design details.", "action": "Describe the specific activity, movement, or interaction occurring in the scene.", "location": "Describe the environment, visible background elements, architectural style, and spatial context.", "lighting": "Analyze the light source, direction, color temperature, hardness/softness of the light, and shadow characteristics.", "camera_angle_and_framing": "Describe the vertical and horizontal angle of the camera relative to the subject (e.g., eye-level, low-angle), and the shot composition size.", "camera_equipment": "Estimate the likely camera type, lens focal length (e.g., wide-angle vs telephoto), aperture effect (depth of field), and film stock or digital sensor characteristics.", "style": "Describe the overall aesthetic, color palette, artistic technique, and visual processing style.", "negative_prompt": "List visual defects or unwanted elements to be excluded to ensure high quality." } ``` ## Instructions 1. **Output Format**: The output must be a single valid JSON object. 2. **Completeness**: All fields are required. If a field is not applicable, provide a reasonable default or describe it as "neutral" or "standard". 3. **Detail**: Be descriptive and specific in each field to ensure high-quality image generation. 4. **Language**: The values in the JSON should be in English (as most image generation models are optimized for English prompts), unless otherwise specified.
Choose the primary action to open PicX Studio with the available template settings. Review the model and format, personalize the creative direction, and generate when ready.
Yes. You can change the subject, setting, lighting, mood, format, and available model controls before creating your image.
This template is free to open and customize. Generation usage is shown in PicX Studio before you create.
Start with Nano Banana 2, which is the model associated with this template. You can compare another compatible model for a different finish.
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