Officially, Nano Banana Pro is Google’s codename for Gemini 3 Pro Image
Most image models behave like adjective combiners: you throw in some style words, they try to mix them into a picture.
Nano Banana Pro (I’ll call it NB Pro below) works more like a visual thinking partner:
- It listens to your goal and context, not just your adjectives.
- It uses Gemini 3 Pro’s reasoning to decide layout, emphasis, and text.
- It often feels like a junior designer who actually tries to understand what you’re trying to achieve.
If you still prompt it like a traditional image model – for example, cozy room, soft lighting – you’re basically using a Pro-level tool in beginner mode.
From my hands-on testing, I’ve distilled six practical principles for using NB Pro as it was meant to be used: not as a picture generator, but as a visualizer of intent.
1. Replace Adjective Stacking with Causal, Intent-Driven Prompts
The default way most people prompt is something like:
“A cozy room, soft lighting, warm color tones.”
Traditional models mostly treat this as a bag of visual tags.
NB Pro responds much better when you speak in causal sentences that include the why and how the image will be used. For example:
“This is a brand awareness ad for a lifestyle company. The lighting needs to be clean and crisp so the product looks premium, and the main character should stand on the right side so we can place the logo and tagline clearly on the left.”
Key differences:
- Adjective stacking: you say what it looks like.
- Causal prompting: you say why it needs to look this way.
Because NB Pro is built on Gemini 3 Pro’s reasoning, it can use that “why” to:
- Decide which elements matter most.
- Adjust composition, lighting and focus to support your goal.
- Produce results that feel closer to a real art direction brief.
Prompt pattern to try
Instead of:
cozy living room, soft lighting, girl reading a book
Try something like:
“This image is for a lifestyle brand ad about slow living. The living room should feel calm and uncluttered, with a woman reading on the sofa. The lighting must be clean and soft because we want the text overlay to stay readable on mobile.”
.jpg "How to Use Google Nano Banana Pro (Gemini 3 Pro Image): A Practical Prompting Guide")
Once you start giving it reasons, the images stop looking like random moodboard mashups and start looking like intentional design.
2. State the Goal, Let Pro Handle the Visual Design Details
One of the biggest mindset shifts with NB Pro is this:
You don’t have to micro-specify every visual detail.
Because the model is designed to reason about layout and usability, you can often just state:
- What the image is for.
- Where it will be seen.
- What the main outcome should be.
For example:
“I need a catchy cover image for a social media carousel about AI. It has to stand out in the feed and stay readable on a phone screen.”
In my tests, NB Pro will typically:
- Enlarge the main subject.
- Reserve clean space for text.
- Increase contrast so it’s visible as a tiny thumbnail.
- Organize the visual flow so the eye goes from main idea → supporting detail.
You don’t always need to say:
- “Use bright colors.”
- “Keep it minimal.”
- “Add lots of negative space.”
Those are design techniques; NB Pro can often choose them for you once it understands your goal.
Prompt pattern to try
“Create a hero image for a blog post called ‘Beginner’s Guide to AI’. The goal is to make it eye-catching on social media, easy to read on mobile, and visually modern enough to match a tech brand.”
From there, you can iterate: if it’s close but not perfect, refine with small, goal-focused nudges.
3. Let It Actually Read Your Content – Then Visualize the Meaning
Here’s where NB Pro starts to feel different from traditional models.
Instead of only describing the picture, you can paste the content itself:
- A market analysis.
- A long-form LinkedIn post.
- Course notes.
- A talk outline.
Then ask NB Pro to read first, design later. For example:
“Read the following analysis about the AI market. Turn it into a clean infographic for a presentation slide. Focus on the 3 key trends and 3 main risks. Make sure each section has a clear title and simple icons.”
In my experience, NB Pro can:
- Extract the main points.
- Group them into logical sections.
- Propose a layout that feels like a real slide or social infographic.
In other words, it’s not only drawing what you describe; it’s visualizing the meaning of your text.
This makes it very strong for:
- Market reports → one-page infographics.
- Blog posts → social media summary graphics.
- Lecture notes → slide-ready diagrams.
Google’s own positioning also highlights this ability to turn dense text into functional visual assets, and in my testing it consistently stands out among the image models I’ve tried so far.
4. For Readable Chinese Text, Use Full Sentences (Not Isolated Words)
NB Pro includes state-of-the-art text rendering, and that includes Chinese. But how you prompt matters a lot.
If you only say:
“Add a Chinese phrase.”
you’ll often get something decorative or half-random.
Instead, you want to be very explicit about:
- The exact sentence.
- How it should feel.
- How readable it needs to be.
For example:
“On the poster, clearly display this sentence in Traditional Chinese: 『AI 讓好點子變成好作品』. The font should be bold and have a poster-like impact. Make sure the text is high-contrast and readable on a phone screen.”
In my tests, this kind of prompt lets NB Pro:
- Choose a more appropriate font style.
- Reserve clean space so the text doesn’t clash with the background.
- Maintain readability even when the image is shrunk for social feeds.
Prompt pattern to try
“Design a social media poster about AI creativity. Show this sentence in bold Traditional Chinese: 『AI 讓好點子變成好作品』. The layout should prioritize readability on mobile, with a clear hierarchy between the main slogan and any secondary text.”
The more you treat NB Pro like a designer who needs a proper copy brief, the better your Chinese typography results get.
5. Use Negative Prompts to Avoid the Cheap “AI Look”
Many people want “AI-generated” speed, without the obvious AI stock image smell.
NB Pro is quite responsive to explicit negative prompts, especially around style and finish. You can say things like:
“Avoid cartoonish style. Avoid plastic 3D look. Avoid glossy, cheap lighting.”
When I do this, NB Pro tends to move towards:
- More realistic or editorial styles.
- Cleaner lighting setups.
- Visuals that feel closer to brand or campaign photography.
This is particularly useful when you’re generating images for:
- Brand websites.
- Product hero shots.
- B2B marketing visuals.
Prompt pattern to try
“Create a realistic portrait-style image for a tech brand website. The character should feel trustworthy and calm. Avoid cartoon style, avoid plastic-looking 3D models, and avoid overly glossy lighting. The final image should feel premium and modern.”
Negative prompts here act as guardrails so NB Pro can explore inside the right style territory.
6. To Draw a Character That Feels Like You, Describe the Role – Not Just the Look
When people try to make a “self-like” character, they often fixate on:
- Hair length.
- Glasses or no glasses.
- Suit vs. hoodie.
With NB Pro, I’ve found it more effective to describe your role and the feeling you want to project.
Instead of:
“Short hair, glasses, wearing a suit.”
Try:
“A professional speaker explaining AI technology on stage, speaking in a calm tone and giving the audience a strong sense of trust.”
NB Pro then focuses on:
- What you do.
- How you show up in context.
- What emotional signal the character should send.
You can still add a few physical traits if they really matter, but leading with role + vibe usually gives a character that feels more like the real you.
Prompt pattern to try
“Illustrate an AI educator on stage, calmly explaining how AI tools help normal people create better work. The character should feel trustworthy and approachable, standing in front of a large projected screen with simple diagrams. Avoid exaggerated expressions or cartoon proportions.”
Among the models I’ve tested so far, NB Pro has been one of the most reliable at capturing this “professional but human” tone when I prompt through roles and intent.
Where Nano Banana Pro Fits in Real Workflows
Nano Banana Pro isn’t just a fun toy for single images. Google has already wired it into real products and enterprise tools – from the Gemini app and Google AI Studio to Google Ads and Vertex AI in the cloud.
In practice, that means you can plug the prompting principles from this guide directly into your daily work:
- Social & content marketing – Generate scroll-stopping covers, carousels, and blog hero images that already respect text hierarchy and mobile readability, then refine them inside your usual design or ad tools.
- Localization & multi-language design – Use Nano Banana Pro’s text rendering and translation-aware behavior to adapt posters, product shots, or infographics into multiple languages without breaking the layout.
- Batch & multi-image workflows – Combine its native multi-image editing support with your own scripts or API calls to update entire sets of creatives in one go – for example, refreshing a full product line’s labels or thumbnails with a single prompt.
- Design collaboration – Treat it as the first-pass designer inside your existing tools: generate rough layouts, background plates, or text-heavy diagrams, then hand them off to Figma, Photoshop, or your human designer for the final polish.
At the same time, remember that no model is perfect. Like other image generators, Nano Banana Pro can still reflect biases from its training data or make odd compositional choices, especially in sensitive topics.
So as you scale up your workflows, it’s worth pairing strong prompting with equally strong review habits: check for cultural bias, inappropriate logos, and brand misalignment before you ship anything into a real campaign.
Bringing It All Together: Nano Banana Pro as a Visual Thinking Partner
The real power of Nano Banana Pro (Gemini 3 Pro Image) is not just that it can draw. Many tools can do that.
Where it really stands out, based on my testing and Google’s own positioning, is its ability to:
- Understand why you need an image.
- Read and summarize what your content means.
- Make design decisions about layout, emphasis and text.
- Turn prompts into functional visual assets – not just pretty pictures.
Once you shift from:
- “Describe some visual aesthetics.” → “Explain the purpose and constraints.”
- “List keywords.” → “Paste the content and ask for visualization.”
- “Tell it what to draw.” → “Tell it what outcome you need.”
…you stop using NB Pro like a normal image model, and start using it the way it was designed: as a visual reasoning engine sitting on top of Gemini 3 Pro.
If you learn to:
- Use causal sentences and explain “why”.
- State the goal instead of micromanaging every stylistic choice.
- Let it read and interpret your long-form content.
- Provide full Chinese sentences with clear readability requirements.
- Add negative prompts to fence off unwanted AI aesthetics.
- Describe your role and intent when designing characters.
…then Nano Banana Pro stops being “just another image model” and becomes a practical, everyday design collaborator.
— Dr. Ken FONG
Traditional Chinese Summary（繁體中文總結）
Google 的 Nano Banana Pro（Gemini 3 Pro Image） 是官方為 Gemini 3 Pro 強化的高階圖像模型，我曾實測一段時間的使用體驗，最大的感受是：
它不僅是把描述變成圖片，而是在將你的「意圖和目的」視覺化。
這篇文章是一份專門整理 Nano Banana Pro 提示技巧的實戰指南，幫助你把模型的能力用在日常創作工作流裡。
第一，使用者要從「堆疊形容詞」轉向「因果句提示」。
傳統寫法會說：cozy room, soft lighting, warm tones。NB Pro 更吃這種描述：「因為這是一張品牌廣告，所以光線要乾淨，人物站右邊讓左邊可以放 Logo 和標題。」當你講清楚「為什麼」和「要拿來做什麼」，模型就知道畫面裡什麼是優先重點，會自動幫你安排光源、構圖與主體比例，畫面不再是「元素都有，卻說不出重點」。
第二，是多講『目的』，少管『形容詞細節』。
例如你只要說：「我要做一張社群懶人包封面，縮圖要很吸睛、手機上看得清楚。」在我的測試裡，NB Pro 會自己放大主題、預留文字區、調整對比與視覺動線。你不一定要列出「亮色、極簡、留白」這些設計用語，它本來就被設計來理解「什麼樣的封面在動態牆裡會停住」。
第三，是讓它「讀完你的內容」，再請它幫你轉成圖。
你可以把一段 AI 市場分析、報告摘要或教學重點丟給 NB Pro，然後說：「讀完這段文字，把重點變成一張簡報用的資訊圖，拆成 3 個趨勢與 3 個風險。」官方也強調它在這種「內容導向的視覺生成」很有優勢，而從我實際測試來看，確實比多數同級模型更會抓重點、拉層級、做出可以直接拿去簡報或發文的版面。
第四，如果你要可讀的中文，要給『句子』，不要只給『詞』。
與其說「加一句中文」，不如說：「畫面上清楚呈現：『AI 讓好點子變成好作品』，字要粗、有海報感，手機縮圖也看得清楚。」官方把文字渲染列為 Nano Banana Pro 的主打能力之一，而實測也的確如此——只要你給完整句子，加上「要好讀」這類需求，成功率會明顯提升。
範例完整中文 Prompt：
「請為一篇介紹 AI 創作的文章設計一張社群海報，畫面上要清楚呈現：『AI 讓好點子變成好作品』，字要粗、有海報感，在手機縮圖上也要清楚易讀。」
第五，是善用反向提示，避開廉價 AI 味。
你可以直接說：「不要卡通感、不要 3D 塑膠感、不要廉價光澤。」在我的使用經驗裡，NB Pro 會變得更接近實拍或品牌視覺，合適放在網站首圖、B2B 專業頁面上使用。
第六，如果你想畫「像你」的人物，請描述『角色意圖』，不是只列外觀。
與其說「短髮、戴眼鏡、穿西裝」，不如說：「一位在台上說明 AI 技術的專業講者，語氣冷靜，帶給觀眾信任感。」在這類描述下，NB Pro 往往能畫出更接近你於真實場景中的「職場形象」。
除了單張圖片創作之外，Nano Banana Pro 其實已經被 Google 佈署在多個實際產品裡，例如 Gemini App、Google AI Studio、Google Ads 以及企業用的 Vertex AI 服務等，也就是說你在這篇文章學到的提示技巧，可以直接搬去日常的行銷、簡報與內容產出流程中使用。
在應用上，幾個特別適合的場景包括：用來快速產出社群懶人包封面與文章首圖、把同一套設計翻成多國語言卻不破壞版面，以及透過 API 做多張圖片或產品型錄的「批次微調」。這些都呼應了官方對 Nano Banana Pro 的定位：不只是要畫得漂亮，而是要把抽象的提示變成真正「可上線使用」的視覺素材。
當然，和其他 AI 影像模型一樣，它仍然有可能在某些情境下放大訓練數據中的偏見或刻板印象，因此在實際上線前，仍然非常建議保留人工檢查的步驟，特別是與種族、性別、公益議題或真實品牌 Logo 有關的畫面。這樣用「AI 協作」而不是「AI 全自動」，才比較接近目前安全又實際的用法。
總結來說，Nano Banana Pro 的強項不僅是畫圖縫花，而是在官方定位及我自身的實測體驗中，都能把「文字和意圖」轉成「真正在簡報、社群與品牌實務中可用的視覺資產」。只要你願意多說一點：為什麼要畫、圖要拿來做什麼、想避免什麼風格、希望觀眾有什麼感受，再配合上面六個原則，它就能幫你做出遠超一般 AI 圖庫水準、可以直接用在簡報、社群與品牌溝通上的專業級視覺成果。
— Dr. Ken FONG
References
- Google AI Developer Documentation – Gemini 3 Pro Image (Nano Banana Pro) overview.
- Google DeepMind – Gemini Image models and reasoning-enhanced composition.
- Google Cloud / Vertex AI – Gemini 3 Pro Image model card and capabilities.
- Selected third-party testing and reviews of Nano Banana Pro’s text rendering and Chinese prompt behavior.
Keywords
Nano Banana Pro, Gemini 3 Pro Image, AI image generation, Google Gemini, visual reasoning, intent-driven prompting, Chinese text rendering, infographic generation, AI design workflow, Dr. Ken FONG
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