Nano Banana 2 Prompts for Legible Fictional City Names and Street Signs

Designing digital postcards often requires more than just a beautiful landscape; it demands believable details that ground the viewer in a specific location. When using Nano Banana 2 to generate images of fictional cities, the most common challenge is ensuring that text elements like street signs, shop names, or building plaques are legible rather than appearing as random scribbles. While the tool supports text-to-image workflows, prompt instructions describe desired outcomes but do not guarantee identity or typography preservation. Therefore, crafting precise instructions is essential for achieving coherent results.

This guide focuses on how to structure your inputs to maximize the chances of generating readable fictional text. We will explore five materially different prompt strategies tailored for various artistic styles and composition needs. Remember that these examples are untested scenarios designed to illustrate best practices for the Nano Banana image generation tool, which is distinct from any physical cosmetic products or skincare brands.

The Importance of Specificity in Typography Prompts

When asking an AI model to render text, vague requests often lead to abstract shapes that resemble letters but lack meaning. To create a postcard where the fictional city name is instantly recognizable, you must explicitly define the font style, placement, and contrast against the background. For instance, simply asking for "a sign" might result in a blurry smudge. Instead, specifying "bold, sans-serif white lettering on a dark blue background" provides the model with concrete visual constraints.

It is crucial to understand that while Google documents Nano Banana 2 as Gemini 3.1 Flash Image, the system does not promise perfect character accuracy in every iteration. The goal is to guide the model toward high-fidelity text representation. By combining descriptive adjectives with structural commands, you can significantly improve the likelihood of obtaining a clean, readable result suitable for a postcard design.

Five Strategies for Generating Clear Text Elements

Below are five distinct prompt approaches you can use within the Nano Banana 2 interface. Each strategy targets a different visual outcome or level of complexity.

1. The High-Contrast Street Sign

Use Case: Ideal for creating a focal point in a busy urban scene where the sign must be the first thing the viewer reads. Prompt Example: "A close-up photograph of a vintage metal street sign hanging from a wrought iron pole. The sign features the fictional city name 'Oakhaven' in crisp, raised gold serif lettering against a deep forest green background. Soft afternoon sunlight creates a slight shadow on the letters, enhancing readability. Photorealistic style, 8k resolution." Adjustment: If the text appears too small, add "extreme close-up" to the beginning of the prompt to force the camera lens to focus tightly on the signage.

2. The Neon Night Scene

Use Case: Perfect for cyberpunk or noir-themed postcards where glowing text adds atmosphere without sacrificing clarity. Prompt Example: "A rainy night street view featuring a neon tube sign mounted above a shop entrance. The sign spells out 'Neon District' in bright pink and cyan tubing. The letters are fully formed and clearly distinguishable despite the wet pavement reflections. Cyberpunk aesthetic, cinematic lighting, sharp focus on the text." Adjustment: If the neon glow obscures the letters, specify "high contrast neon with defined edges" to prevent the light from bleeding into the characters.

3. The Minimalist Architectural Plaque

Use Case: Best for modern, clean designs where the text should look like an engraved part of the building itself. Prompt Example: "A low-angle shot of a sleek concrete building facade. A minimalist brass plaque is embedded in the wall, displaying the fictional name 'Silica Heights' in clean, lowercase sans-serif font. The engraving is precise and legible. Modern architecture, soft overcast lighting, macro photography." Adjustment: If the text looks too shallow, request "deeply engraved lettering" to increase the perceived depth and shadow contrast.

4. The Hand-Painted Shop Front

Use Case: Suitable for whimsical or storybook-style postcards where the text has a charming, imperfect feel but remains readable. Prompt Example: "A charming cobblestone street with a quaint bakery. Above the door, a hand-painted wooden sign reads 'The Flour Mill' in rustic, slightly uneven black brush strokes. The paint texture is visible, but the words are perfectly legible. Storybook illustration style, warm colors, detailed texture." Adjustment: If the handwriting becomes illegible, change the instruction to "clear, block-letter hand painting" to enforce a more structured approach.

5. The Digital Billboard Overlay

Use Case: Useful for futuristic settings where the text is part of a large-scale digital display. Prompt Example: "A wide shot of a futuristic city skyline at dusk. A massive LED billboard dominates the center, displaying the fictional city name 'Aeropolis' in bold, white digital font. The text is pixel-perfect and glowing brightly against the dark sky. Sci-fi concept art, ultra-detailed, 8k." Adjustment: If the pixels appear too jagged, ask for "smooth vector-style digital text" to soften the rendering while maintaining clarity.

Optimizing Your Workflow for Better Results

While these prompts provide a strong foundation, remember that Nano Banana 2 Lite is focused on speed and cost and is not optimized for multiple reference inputs or complex multi-turn editing. For tasks requiring high precision in text rendering, standard Nano Banana 2 or Pro models may offer better stability. Always review the generated output; if the text is slightly off, try rephrasing the description of the font weight or color rather than changing the entire scene.

By treating text as a primary visual element rather than an afterthought, you can transform generic AI generations into professional-grade postcards. These strategies help bridge the gap between creative imagination and technical execution. Try Nano Banana to experiment with these prompts and refine your own fictional world-building projects.

For further technical details on the underlying models, refer to the official Google Gemini image generation documentation.