How To Create a Poster in ChatGPT: Featuring a Miniature City Held In a Hand


Romen Roy
9 Sept, 2025
How To Create a Poster in ChatGPT: Featuring a Miniature City Held In a Hand

Creating a visually stunning poster can elevate your project, event, or personal brand. While ChatGPT itself doesn’t generate images, it can help craft detailed prompts for AI image generation tools like DALL·E, MidJourney, or Stable Diffusion to design a poster featuring a surreal concept, such as a miniature city held in a hand. This blog post guides you through the process of using ChatGPT to create a compelling poster design.

Step 1: Understand Your Poster’s Purpose

Before diving into the design, define the poster’s goal. Is it for an event, a creative project, or a promotional campaign? For this example, we’ll create a poster with a surreal, imaginative theme: a hand holding a miniature city, evoking wonder and creativity. The mood will be vibrant, futuristic, and eye-catching, perfect for a sci-fi event or art showcase.

Step 2: Use ChatGPT to Craft a Detailed Prompt

ChatGPT excels at generating precise prompts for AI image tools. Ask ChatGPT to help you create a descriptive prompt for your poster. Here’s an example of how to phrase your request:

Copy This Prompt
Create a hyper-realistic [X:Y] poster featuring a human hand. On the palm, place a minimalist stylized 3D model of [City] with iconic landmarks. A tiny 3D '[City]' sign naturally embedded within the cityscape. Use a sleek, modern aesthetic—subtle glow, soft shadows, and a muted color palette with pops of contrast. Enhance with atmospheric effects and dynamic lighting for depth. Photorealistic, 8K, ultra-detailed, akin to a high-end architectural render or DSLR photo.
Prompt4u.Site

Sample ChatGPT Output (Prompt):
Create a high-resolution, vertical poster (A3 size, 11.7x16.5 inches) featuring a surreal, futuristic scene of a human hand gently holding a miniature city. The city glows with vibrant neon lights in blues, purples, and pinks, with tiny skyscrapers, domes, and hovering vehicles. The hand is positioned palm-up, centered in the frame, with intricate details like subtle skin texture and soft lighting. The background is a starry night sky with a gradient of deep indigo to black, dotted with glowing stars and a faint aurora. At the bottom, include bold, modern text reading ‘IMAGINE THE FUTURE’ in a sleek, sans-serif font, glowing faintly in white with a neon outline. The overall mood is vibrant, surreal, and futuristic, optimized for professional printing.

Step 3: Choose an AI Image Generation Tool

Since ChatGPT can’t generate images directly, select a tool that supports high-resolution outputs and surreal art styles. Recommended platforms include:

  • DALL·E 3: Ideal for vibrant, detailed imagery.
  • MidJourney: Perfect for artistic and surreal designs.
  • Stable Diffusion: Great for customizable, high-quality outputs.

For this poster, MidJourney or DALL·E 3 are excellent choices due to their ability to handle surreal concepts and glowing effects.

Step 4: Input the Prompt into the Image Tool

Copy the prompt generated by ChatGPT into your chosen AI image tool. Adjust settings if needed:

  • Resolution: Set to at least 300 DPI for print-quality (e.g., 3508x4961 pixels for A3).
  • Style: Emphasize “surreal” and “futuristic” for a cohesive look.
  • Aspect Ratio: Use 11.7:16.5 for a vertical A3 poster.

If using MidJourney, add parameters like --ar 11.7:16.5 --v 5 --q 2 for high quality and correct proportions.

Step 5: Refine the Generated Image

AI-generated images may need tweaking to meet your vision. If the first output isn’t perfect, try these steps:

  • Tweak the Prompt: Ask ChatGPT to refine the prompt, e.g., “Make the city lights brighter” or “Add more stars in the background.”
  • Regenerate Variations: Most tools allow multiple iterations. Select the best one.
  • Inpainting: Use the tool’s editing features to fix small issues, like misaligned text or inconsistent lighting.

Ensure the text “IMAGINE THE FUTURE” is bold, legible, and matches the futuristic aesthetic.

Step 6: Post-Processing for Print

Once you have a solid image, use editing software like Adobe Photoshop, GIMP, or Canva to polish it:

  • Adjust colors to enhance the neon glow of the city and the starry sky.
  • Sharpen the hand and city details for crispness.
  • Verify the text is clear and properly aligned for printing.
  • Export in a print-ready format like PDF or TIFF, ensuring 300 DPI and CMYK color mode.

Step 7: Print and Share Your Poster

Your poster is now ready! Use it for:

  • Events: Promote a sci-fi convention, art gallery, or tech expo.
  • Digital Sharing: Post on social media or your website for digital campaigns.
  • Physical Prints: Print through a professional service like Vistaprint or local print shops for high-quality results.

Tips for Success

  • Collaborate with ChatGPT: If the initial prompt isn’t perfect, ask ChatGPT to refine it based on feedback, e.g., “Make the city more futuristic with flying cars.”
  • Test Multiple Tools: Compare outputs from MidJourney, DALL·E, or Stable Diffusion to find the best result.
  • Check Print Specs: Confirm your poster’s dimensions and resolution match your printer’s requirements.

Using ChatGPT to craft a detailed prompt for AI image generation tools is a game-changer for creating unique posters. By combining ChatGPT’s prompt-writing capabilities with tools like MidJourney or DALL·E, you can design a stunning poster featuring a miniature city held in a hand, perfect for capturing attention and sparking imagination. Experiment with prompts, refine your output, and bring your creative vision to life!

Share with Friends

Previous Post Next Post