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Create Any Poster With One Magical Prompt on Nano Banana Pro

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Hey guys! So I recently came up with a super helpful prompt that you can use to create any kind of poster instantly with Nano Banana Pro. I’m talking about anything — food and beverage posters, sports events, movie posters, corporate designs, campaigns, party events, thumbnails, and so much more. If you’ve ever wanted to create a cool-looking poster without having any design skills, this might be exactly what you need.

Create ai poster in nano banana pro

A lot of people want to try AI design tools, but the whole “prompting” thing can feel overwhelming. You start thinking too much about wording, camera angles, aesthetic directions, visual vibes… and suddenly it’s not fun anymore. That’s why I made this prompt: to help you create high-quality posters without needing to think that hard. You just fill in a few simple fields and boom — ChatGPT will generate a complete, premium-ready prompt that Nano Banana Pro can use to make your poster.

Whether you're preparing a big event, promoting something online, creating YouTube thumbnails, or just experimenting for fun, this guide will take you through everything step-by-step. So, let’s jump straight into it!

Step 1: Preparing the Prompt

Before we generate anything, we need our base prompt — the one I personally use and trust every single time. This prompt tells ChatGPT to behave like a professional visual designer, follow specific logic, detect sports themes automatically, handle typography, and prepare a clean, structured prompt ready for Nano Banana Pro.

Here’s the base prompt you’ll use:

You are a professional visual designer.

Generate a complete poster prompt based on the user's inputs below.

USER INPUT:

- Title: {Your Title Here}

- Poster Type: {Your Poster Type Here}

- Sport Type (optional, only if related to sports): {Fill Here if Sport}

- Typography Text (optional): {Fill here}

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SYSTEM LOGIC:

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1. SPORT DETECTION:

If Poster Type or Title contains keywords related to sports:

"sport", "sports", "event olahraga", "pertandingan", "tournament", "league",

"kejuaraan", "match", "cup", "liga", "mabar", "sparring", "tim", etc.,

→ Activate SPORTS MODE.

2. MAIN HERO (foreground) RULES:

If SPORTS MODE is active:

   - Determine the correct number of athletes based on the title:

     a) If title includes a specific sport team, league, or club name:

        → Use a **full team lineup** (5–11 athletes depending on the sport).

     b) If title includes words like “duel”, “final”, “vs”, “laga”, “match”, “pertandingan”:

        → Use **two main athletes** facing each other.

     c) If title includes “turnamen”, “tournament”, “open”, “cup”, “championship”:

        → Use **3–5 mixed athletes** representing various styles/poses.

     d) If title includes generic hobby or friendly event like “mabar”, “fun match”:

        → Use **2–4 casual-yet-athletic players**.

     e) Otherwise:

        → Use **one iconic athlete** representing the sport.

3. ATHLETE SELECTION:

- Match athlete appearance to the {SPORT}.

- If a real-world famous athlete exists and is universal:

    Automatically select the most iconic athlete(s), for example:

    - Badminton → Viktor Axelsen, Tai Tzu Ying, Anthony Ginting

    - Football → Lionel Messi, Cristiano Ronaldo

    - Basketball → Stephen Curry, LeBron James

    - Tennis → Novak Djokovic, Iga Świątek

    - Running → Usain Bolt

    - Swimming → Caeleb Dressel, Katie Ledecky

- Ensure realistic gear, professional pose, and premium look.

4. TYPOGRAPHY AUTOMATION:

If the user leaves typography empty:

- Auto-generate powerful, high-impact lines based on {TITLE} and {EVENT/PRODUCT TYPE}

- Include:

    - Main headline

    - Supporting tagline

    - Optional date/time slot

    - Optional CTA

    - Optional hashtags

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FINAL POSTER PROMPT TO OUTPUT:

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Create a premium, high-quality promotional poster for: **{TITLE}**

Poster Context:

This is a {EVENT/PRODUCT TYPE}.  

Automatically set creative direction, intensity, and mood to fit the theme.

Camera & Composition:

- Cinematic dynamic angle

- Shallow depth-of-field

- Ultra-sharp hero subject(s)

- High-speed clarity for sports motion

Hero Visual (Foreground):

- Auto-select the correct number of athletes based on the Title logic

- Athletes must match the {SPORT}

- If relevant, use famous global athletes

- Include authentic sport accessories (racket, ball, shoes, jersey, etc.)

- Energetic poses: smashing, sprinting, dribbling, serving, team huddle, etc.

- Add subtle motion blur, sweat particles, stadium lights, or action trails

Background:

- Automatically adjust to suit sport type and event tone

- Stadium lights, arena atmosphere, motion energy, gradient bursts, etc.

- Maintain clean negative space for readable text

Lighting & Colors:

- High-contrast dramatic lighting

- Professional sports advertising palette

- Strong highlights, crisp shadows, energetic tones

Typography:

If provided by user:

- Use user text: {TYPOGRAPHY}

If empty:

- Auto-generate:

    - Powerful headline inspired by "{TITLE}"

    - Sport-themed tagline

    - Optional date & venue line

    - Optional CTA (Join Now / Register / Watch Live)

    - Hashtags relevant to sport and event

Branding:

- Reserved area for sponsor logos or team logo

- Optional watermark area at bottom

Technical Requirements:

- Aspect ratio 4:5 (1080×1350)

- Social-media ready & print-ready resolution

- Proper safe area for all text elements

You don’t have to think about the complicated structured logic above — it’s already built into the prompt.

You only need to fill in four things:

  1. Title – whatever your poster is about. Example: Real Madrid vs Barcelona – Upcoming Match.
  2. Poster Type – like Sport, Food, Drink, Corporate, Movie, Event, etc.
  3. Sport Type – only if the poster type is related to sports (e.g., Football, Basketball, Tennis).
  4. Typography Text – any text you want displayed on the poster. If you're unsure, leave it blank so ChatGPT can write it for you automatically.

Once you've filled the four fields:

  1. Copy the whole prompt.
  2. Open the ChatGPT app.
  3. Paste the prompt and hit Send.
  4. ChatGPT will return a complete ready-to-use prompt tailored for Nano Banana Pro.

Super easy, right?

Step 2: Generating the Poster (Sports Example)

Create ai sport posters

Now let’s move to the fun part — creating the poster.

For this example, I made a sports poster. You can follow the exact same steps for anything else.

Here’s the process:

  1. Open your browser.
  2. Go to Google Gemini.
  3. Select the Create Images feature — the one with the banana icon.
  4. Paste the final prompt you got from ChatGPT.
  5. Hit Send.
  6. Wait a few seconds for the AI to generate your poster.

And that's it — your poster is done! Nano Banana Pro usually creates incredibly clean visuals with strong lighting, dramatic composition, and razor-sharp details. It’s honestly pretty crazy what it can do with the right prompt.

If your poster is sports-related, you'll see athletes automatically chosen, stadium-like backgrounds, dynamic poses, motion effects, and dramatic lighting. Everything looks professionally designed, even without you touching Photoshop or knowing any design basics.

Step 3: Creating Another Poster (Food Example)

Create ai food posters

Let’s try something different — a food poster.

This time I filled in:

  1. Title: Burger Queen
  2. Poster Type: Food
  3. Sport type: leave empty
  4. Typography text: leave empty (ChatGPT will auto-generate your headline and tagline)

The rest of the steps are the same:

  1. Paste into ChatGPT
  2. Receive a clean, formatted final poster prompt
  3. Paste it into Nano Banana Pro
  4. Generate the poster

The result? A premium-style food poster with bold lighting, glossy burger highlights, warm color tones, strong typography, and advertising-level aesthetics. And yes — you made all of this without drawing anything or picking up a single design tool.

With this method, you can literally create any kind of poster:

  • Drinks
  • Corporate recruitment
  • Campaigns
  • YouTube thumbnails
  • Event flyers
  • Product ads
  • Sport match promos
  • And many more

As long as you follow the simple fill-in structure, your results will always come out beautiful.

Video Tutorial

If you want to follow along visually, I also made a full video tutorial. You can watch it here:

Conclusion

Creating posters used to be something that only designers with special software could do. But now, with tools like ChatGPT and Nano Banana Pro, you can generate high-quality posters in minutes, even with zero experience. All you need is one powerful prompt — and I’ve already prepared it for you.

Just fill in the title, poster type, sport type (if needed), and typography text. ChatGPT will handle everything else. Then, paste the final structured prompt into Nano Banana Pro and watch your poster appear like magic.

Whether you're making posters for fun, for YouTube, for work, for school, or for events, this method makes everything simple, fast, and incredibly satisfying. So go ahead — try creating your own poster today. I promise, once you see the results, you’ll want to make more.

Let me know if you want me to create templates, extra variations, or auto-fill examples for different poster categories!

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