tomevault-io Nano Banana Image Prompt Generator
Generate high-quality prompts for Gemini 2.5 Flash Image using proven best practices from October 2025.
Core Principle
Describe scenes naturally, don't list keywords.
❌ woman, business suit, office, professional
✅ A professional businesswoman in navy suit stands confidently in modern glass-walled office overlooking city skyline. Warm afternoon light streams through windows.
Prompt Structure
Basic Template
A [SHOT TYPE] of [SUBJECT] [ACTION] in [ENVIRONMENT].
[LIGHTING] creates [MOOD]. [CAMERA/STYLE DETAILS]. [ASPECT RATIO].
Components
- Subject & Action - Who/what and what they're doing
- Setting - Where the scene takes place
- Lighting - Natural/artificial light sources and quality
- Mood - Emotional tone or atmosphere
- Technical Details - Camera, lens, style specifics
- Format - Aspect ratio or dimensions
Prompt Length
- Short (10-20 words): Quick generation, minimal control
- Medium (50-100 words): ⭐ RECOMMENDED - balanced control
- Long (100-200 words): Maximum control for complex scenes
Photography Prompts
Template
Photorealistic [SHOT TYPE] of [SUBJECT], [ACTION], in [ENVIRONMENT].
Illuminated by [LIGHTING], creating [MOOD]. Captured with [CAMERA/LENS],
emphasizing [DETAILS]. [ASPECT RATIO] format.
Camera Control
Lenses:
- 35mm, 50mm (standard)
- 85mm portrait (close-ups)
- 10-24mm wide (landscapes)
- 60-105mm macro (details)
Lighting:
- Golden hour (warm, soft)
- Blue hour (cool, atmospheric)
- Three-point (studio)
- Dramatic side (high contrast)
- Rembrandt (classic portrait)
Settings:
- Shallow DOF: f/1.4-2.8 (blurred background)
- Deep focus: f/11-22 (everything sharp)
- Motion blur for action
Example
Professional corporate headshot of mid-30s woman with shoulder-length brown hair
in charcoal blazer. She's smiling warmly at camera against soft gray backdrop.
Shot with 85mm f/2.0, studio three-point lighting creates gentle shadows defining
facial features. Ultra-high resolution, LinkedIn-ready quality. 1:1 format.
Art & Illustration Prompts
Template
[STYLE] illustration of [SUBJECT] [ACTION/POSE]. [COMPOSITION] with
[COLOR PALETTE]. [TECHNIQUE/MEDIUM]. Inspired by [REFERENCE],
emphasizing [QUALITIES].
Common Styles
- Watercolor painting
- Digital art
- Oil painting
- Pencil sketch
- Ink drawing
- Anime/manga
- Pixel art
- Minimalist vector
Example
Watercolor illustration of young girl reading book under oak tree. Seated
cross-legged in sun-dappled clearing with wildflowers. Soft, loose brushstrokes
with pastel color palette of greens, yellows, pinks. Transparent washes create
dreamy, ethereal quality. Inspired by children's book illustration, emphasizing
wonder and tranquility. 4:5 portrait format.
Text Rendering
Best Practices:
- Keep under 25 characters total
- Maximum 2-3 phrases
- Specify font style (bold, script, sans-serif)
- Put exact text in quotes
- Describe position explicitly
Example:
Movie poster with bold red text "SUMMER" at top and "Adventure Awaits"
in white script font at bottom. Ocean sunset background. Cinematic style.
Multi-Turn Editing Workflow
Nano Banana excels at conversational editing. Make one change at a time.
Example sequence:
- "Create professional headshot of woman in business attire"
- "Change background to modern office"
- "Make her wearing glasses"
- "Add warmer lighting"
Product Photography
Template
High-resolution product photo of [PRODUCT] on [SURFACE]. [LIGHTING]
to [PURPOSE]. Camera angle: [TYPE] to showcase [FEATURE]. Ultra-realistic,
sharp focus on [DETAIL]. [ASPECT RATIO].
Example
High-resolution product photo of stainless steel smartwatch on white marble
surface. Soft diffused studio lighting from 45-degree angle to minimize
reflections and show screen clearly. Camera angle: slight overhead to showcase
circular face and metal band texture. Ultra-realistic, sharp focus on watch
face display. 1:1 format for e-commerce.
Landscape Photography
Template
[TYPE] landscape of [LOCATION] at [TIME]. [WEATHER/ATMOSPHERE].
[FOREGROUND ELEMENTS]. Shot with [LENS] from [VANTAGE POINT].
[COMPOSITION]. Professional landscape photography with [GRADING]. [MOOD].
Example
Dramatic landscape of mountain lake at golden hour. Wispy clouds catch
warm orange light over snow-capped peaks. Weathered dock extends into
mirror-still water as foreground. Shot with 16mm wide-angle from low
lakeside vantage. Rule-of-thirds composition places horizon in upper third.
Professional landscape photography with warm color grading. Serene yet majestic.
Abstract Art
Template
[MOVEMENT] abstract exploring [CONCEPT]. [COMPOSITION] with [COLORS/TEXTURES].
[MEDIUM] emphasizing [GOALS]. [CONTEXT].
Example
Bold geometric abstract exploring tension and harmony. Overlapping angular
shapes with vibrant primary colors against deep black. Digital art emphasizing
sharp edges and color interaction. Large-scale wall art format, 16:9.
Common Pitfalls
Avoid:
- Keyword lists without context
- Vague descriptions
- Conflicting style instructions
- Overly complex text rendering
- Too many simultaneous changes in edits
Instead:
- Use complete sentences
- Be specific about details
- Maintain style consistency
- Keep text simple
- Edit iteratively
Style References
When requesting specific artistic styles, reference:
- Art movements (impressionism, art deco)
- Artists (in style of Van Gogh's brushwork)
- Media (watercolor, oil painting, digital art)
- Eras (1950s photography, modern minimalist)
Aspect Ratios
- 1:1 - Square (social media, profile pics)
- 16:9 - Landscape (presentations, headers)
- 9:16 - Portrait (mobile, stories)
- 4:5 - Portrait (Instagram posts)
- 2:3 - Classic portrait
- 3:2 - Standard photo
Quick Prompt Checklist
✅ Subject clearly described ✅ Action or pose specified ✅ Environment/setting detailed ✅ Lighting source and quality ✅ Mood or atmosphere ✅ Style or technical specs ✅ Aspect ratio chosen ✅ Complete sentences, not keywords
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