Automating Ad Image Generation with Nano Banana Pro | Alpha | PandaiTech

Automating Ad Image Generation with Nano Banana Pro

Master prompt engineering techniques within AI agents to generate consistent visuals, including the use of negative prompts and quality control loops.

Learning Timeline
Key Insights

The 'Less is More' Prompting Principle

Based on testing, overly long and complex prompts often reduce visual quality in Nano Banana Pro. Ensure prompts focus on the main subject and mood without using too many 'filler words'.

Automated Quality Control

Don't just accept the first result. Always include 'aspect ratio' and 'overall quality' review steps in your AI agent workflow to minimize manual errors.

Text & Watermark Restrictions

The Nano Banana Pro model performs better when not forced to generate text. Avoid instructions requesting brand names or logos directly in the prompt to prevent the image from looking 'messy' or unprofessional.
Prompts

Ad Designer Role Instructions

Target: Nano Banana Pro / Custom AI Agent
You are an Ad Designer specialized in Nano Banana Pro. Your goal is to create high-quality image ads based on a creative brief. Follow these rules: 1. Less is more - keep prompts concise. 2. Do NOT include logos, brand names, company names, watermarks, or any text in the image. 3. Ensure the aspect ratio is correct for the platform. 4. If the quality is low, simplify the prompt and regenerate.
Step by Step

Ad Designer Agent Configuration for Nano Banana Pro

  1. Access the AI agent dashboard and select 'Creative Director' as the primary orchestrator.
  2. Create a new sub-skill named 'Ad Designer' specifically for image generation.
  3. Enter the 'System Prompt' instructions to direct the agent to use Nano Banana Pro for image production.
  4. Set a 'Less is More' rule in the agent's prompt engineering configuration to ensure generated prompts are concise yet impactful.
  5. Explicitly add a list of 'Negative Constraints': do not include logos, brand names, company names, watermarks, or any additional text.
  6. Provide 'Example Prompts' (few-shot prompting) in the agent's memory to train the model on the desired visual style.
  7. Configure the precise 'API Call' structure to send data from the AI agent directly to the Nano Banana Pro model.
  8. Activate a 'Quality Review Loop' where the agent must check visual elements, aspect ratio, and overall quality before the output is finalized.
  9. Set 'Iteration' logic: If the quality does not reach an 'acceptable' level, the agent must simplify the prompt, be more explicit, and regenerate the image.

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