Nano Banana Pro Prompting: The Complete Guide

In the world of AI image generation, Nano Banana Pro powered by Gemini 3 offers unparalleled control over visuals, text rendering, and complex compositions. Whether you’re creating product photography, UI mockups, or visualizing concepts, mastering prompting can elevate your outputs from basic to professional-grade.

What You’ll Learn

• Core best practices for writing effective prompts
• How to structure prompts like a professional brief
• Advanced techniques including JSON prompts and multimodal blending
• Common pitfalls and how to avoid them

What Is Nano Banana Pro?

Nano Banana Pro is an AI-driven image generator renowned for its precision, prompt adherence, and ability to handle intricate logic, spatial constraints, and multimodal inputs. It integrates real-world knowledge for accurate depictions, supports up to 14 image blends, and excels in tasks like text integration, diagram creation, and photo editing.

Note: Available through platforms like the Gemini app, AI Studio, and Vertex, Nano Banana Pro is ideal for branding, content creation, and technical visualization.

Core Best Practices

Be Specific and Descriptive

Specificity is paramount. Instead of generic requests, describe every detail that matters.

Vague prompt:

a cat

Specific prompt:

A fluffy orange British shorthair kitten sitting on a marble countertop
with soft morning light filtering through a window, shallow depth of field,
warm color palette, professional pet photography

Include these elements in your descriptions:

• Subject: Who or what is the focus
• Composition: Camera angles (low-angle, wide shot, close-up)
• Action: What’s happening in the scene
• Setting: Location and time of day
• Style: Realistic, anime, oil painting, cinematic
• Editing: Specific adjustments or background changes

Tip: Use layered descriptions: start with the main subject, add atmospheric details (misty fog), materials (glossy metallic), and mood (dramatic shadows).

Structure Your Prompts Like a Professional Brief

Treat prompts as natural language instructions to a human artist. Use full sentences and provide context.

The 5-layer structure:

1. Style and Art Direction: “Photorealistic with cinematic depth”
2. Scene and Environment: “A bustling futuristic cafe on Mars during golden hour”
3. Main Subject and Action: “A stoic robot barista brewing coffee”
4. Camera and Lighting: “Low-angle shot with shallow depth of field (f/1.8) and volumetric rays”
5. Textures and Colors: “Matte ceramic textures in pastel tones”

Photorealistic cinematic shot of a stoic robot barista brewing coffee
in a bustling futuristic cafe on Mars during golden hour. Low-angle
composition with shallow depth of field (f/1.8), volumetric light rays
streaming through windows. Matte ceramic textures, pastel color palette
with warm orange accents.

Leverage Cinematic Language

Film-inspired terms create immersive results. Use phrases like:

• “Shot on 35mm film”
• “Bokeh background”
• “Rim lighting”
• “Golden hour backlighting with long shadows”
• “Wide cinematic lens with subtle vignette”
• “Shallow depth of field”

Portrait shot on 35mm film, golden hour backlighting creating rim light
around subject, bokeh background with city lights, subtle film grain,
cinematic color grading

Edit Iteratively

Tip: Golden rule: Refine existing outputs through conversational edits rather than starting over. Say “Turn this scene into nighttime” or “Focus on the flowers” to maintain consistency.

This approach saves time and leverages the model’s understanding of your context.

Advanced Techniques

Multimodal Prompting and Image Blending

Nano Banana Pro supports blending up to 14 images for new compositions while maintaining lighting and textures.

Use cases:

• Compress text into infographics
• Convert 2D floor plans to 3D interiors
• Transform sketches to photorealistic renders
• Ground prompts with real-time data for accuracy

Using Image A for the pose and Image B for the clothing style,
create a photorealistic fashion photograph with studio lighting

JSON Structured Prompts

For precise layouts and complex compositions, JSON structures ensure semantic regions and spatial constraints are respected:

{
  "title": "3D Fighting Game Character Select Screen",
  "characters": {
    "count": 10,
    "rules": ["Transform each into a realistic 3D fighter model"]
  },
  "visual_style": {
    "lighting": ["harsh directional spotlights"],
    "environment": "dark stone-and-metal arena"
  }
}

Maintaining Character Consistency

Lock identities with reference images (up to 6 for high fidelity) to keep facial features consistent across poses or scenes.

Generate the man from Image 1 as a 3D game character with tactical gear,
maintaining exact facial features and proportions

Note: Character consistency is ideal for storytelling, brand mascots, and creating cohesive visual narratives across multiple images.

Prompt Examples by Use Case

Product Photography

Gold necklace on a sandy beach with morning light, soft shadows,
and scattered seashells – product shoot style, high realism,
shallow depth of field

Math and Logic

An office with 10 people arranged (2 front, 3 middle, 5 back),
each holding a unique object starting with letter 'A'

Photo Editing

Remove distracting elements like wires and litter, seamlessly
blending the environment – moody cinematic teal-orange color grade

Infographics

High-resolution technical breakdown of F-117 Nighthawk aircraft
with labels for components, materials, and specifications.
Clean diagram style with dark background.

Common Pitfalls to Avoid

Warning: Avoid vague or conflicting prompts, which can cause artifacts like unnatural blends or inaccurate text rendering.

1. Vague Descriptions

Don’t rely on the model to fill in details. Be explicit about everything that matters to your output.

2. Overloaded Prompts

Too many instructions confuses the model. Keep prompts focused on the essential elements.

3. Conflicting Instructions

“Fast-paced peaceful scene” creates confusion. Ensure all descriptors work together.

4. Skipping Verification

Always verify factual outputs, especially in diagrams and infographics. Use negative prompts to exclude common errors:

[your prompt], no blur, no extra limbs, no distorted hands,
no washed-out backgrounds

Conclusion

Mastering Nano Banana Pro prompting transforms AI from a novelty to a powerhouse tool. By emphasizing specificity, structure, and iteration, you’ll produce consistent, high-fidelity results tailored to your needs.

Key takeaways:

• Be specific and descriptive with layered details
• Structure prompts using the 5-layer framework
• Use cinematic language for professional results
• Edit iteratively instead of regenerating
• Leverage advanced features like JSON and multimodal inputs

Ready to create stunning AI images? Try our AI Image Generator and put these techniques into practice!

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