Batch-Generate High-Quality UGC Product Images with Nano Banana

Upload product image to Google Drive → Mistral generates 50 scene prompts → Fal.ai Nano Banana image-to-image → auto-save back to Google Drive

Who

Content creators, e-commerce operators, marketing teams

You get

Automatically produce 50 UGC-style product images and save them back to the same folder

You need

n8n · fal-ai · google-drive

Steps

1. Configure credentials and initial node

   In n8n Credentials, connect Google Drive (OAuth2, requires Client ID / Secret). Open the Setup node (Edit Fields) and replace the FalAPIKey value from [YOUR_API_KEY] with your actual Fal.ai API key.

2. Set up Google Drive trigger

   Configure the Google Drive Trigger node: select specificFolder mode and specify the folder to watch (e.g., UGC). Set event to fileCreated. The folder and its contents must be publicly accessible.

3. Configure prompt generation node

   The Generate Prompts node uses Mistral Cloud Chat Model + Structured Output Parser. The system prompt sets the role as UGC marketing image expert; the user message uses an n8n expression referencing the uploaded file name to extract the product name, requesting 50 scene prompts.

   Execution prompt · Source text。Generate Prompts node System / Text field

   Copy prompt

   You are an expert content creator specializing in UGC (User-Generated Content) style marketing images.

   Execution prompt · Source text。Generate Prompts node Messages → messageValues[0] → message field (n8n expression, starts with =)

   Copy prompt

   =The product the Promote is a {{ $('Google Drive Trigger').item.json.name.match(/^[^.]+/)[0] }}
   
   Your task is to generate 50 creative, diverse, and realistic situations prompts for an image-to-image generation model. Each prompt should describe a different situation or scenario where the product is being used. 
   
   Requirements for each prompt:
   1. Specify the environment or setting (e.g., home, office, kitchen).  
   2. Include a human or realistic context interacting with the product (e.g., holding it, using it, displaying it).  
   3. Highlight at least one functionality or feature of the product in the scene.  
   4. Keep the prompts concise (1–2 sentences), vivid, and visually descriptive.  
   5. Maintain diversity: do not repeat the same type of scene. Include different times of day, moods, activities, or locations.
   
   Output format (JSON array):
   {
         "ugc_prompts": [
                 {"prompt": "First prompt here..."},
                 {"prompt": "Second prompt here..."},
                 ...
                 {"prompt": "Fiftieth prompt here..."}
                         ]
   }
   
   Example input:  
   Product: "Smart Water Bottle"  
   
   Example output:
   {
         "ugc_prompts": [
                   {"prompt": "A young woman jogging in a park, drinking from the Smart Water Bottle, enjoying cold water on a sunny morning."},
                   {"prompt": "A man sitting at his office desk, checking water intake on his Smart Water Bottle synced with his phone."},
                   {"prompt": "A family hiking on a trail, each carrying a Smart Water Bottle to stay hydrated."},...
                        ]
   }
   
   DON'T RETURN ANYTHING ELSE THAN THE JSON!

4. Execute batch image generation

   The Split Out node splits 50 prompts into individual items; Loop Over Items processes each one. In each iteration, the Generate Image node sends a POST request to Fal.ai (gemini-25-flash-image/edit) with the prompt and product image URL; the Retrieve Image node downloads the generated result.

   Execution prompt · Source text。Generate Image node JSON Body field

   Copy prompt

   ={
     "prompt": "{{ $json.prompt }}",
     "image_urls": [
   "https://drive.google.com/uc?export=view&id={{ $('Google Drive Trigger').first().json.id }}"
     ],
     "num_images": 1,
     "output_format": "jpeg",
     "sync_mode": false
   }

   Execution prompt · Source text。Generate Image node Header Parameters → Authorization value

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   =Key {{ $('Setup').first().json.FalAPIKey }}

   Execution prompt · Source text。Retrieve Image node URL field

   Copy prompt

   ={{ $json.images[0].url }}

5. Upload results back to Google Drive

   The Upload file node uploads generated images back to the same Google Drive folder. The file name combines the original product name with the prompt number.

You are setting up an n8n workflow: after uploading a product image, automatically generate 50 UGC-style images via Mistral + Fal.ai Nano Banana and save them back to Google Drive. Please confirm you have a Fal.ai API key and Google Drive OAuth2 credentials ready before configuring nodes step by step.