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

Common Issues & Solutions

Prompt Quality Issues

Issue

Generic or vague output

Cause

Prompt too short or lacks specificity

Solution

Expand to 50-100 words. Add lighting details, mood, and specific technical specs (lens, style, etc.).

Example

:

❌ Too vague: "A woman in an office"

✅ Specific: "Professional businesswoman in navy suit stands confidently in modern glass-walled office overlooking city skyline at golden hour. Warm afternoon light streams through floor-to-ceiling windows creating soft rim lighting. Shot with 50mm f/2.0, shallow depth of field blurs cityscape background. Confident yet approachable mood. 4:5 portrait format."

Issue

Conflicting style instructions

Cause

Mixing incompatible styles (e.g., "photorealistic watercolor")

Solution

Choose one primary style. For photography, use camera terminology. For art, use medium/technique terminology.

Issue

Text rendering failures

Cause

Too much text, complex fonts, or unclear positioning

Solution

:

Limit to under 25 characters total

Use simple, clear fonts (bold, script, sans-serif)

Specify exact position ("at top", "centered", "bottom right")

Put text in quotes: "SUMMER"

Issue

Unwanted elements in image

Cause

Ambiguous phrasing or conflicting descriptors

Solution

Be explicit about what should NOT appear. Use precise, unambiguous language.

Generation Issues

Issue

Image doesn't match prompt

Cause

Prompt too complex or contradictory elements

Solution

:

Simplify prompt to core concept

Use multi-turn editing workflow

Start basic, refine iteratively

Issue

Inconsistent results across generations

Cause

Vague descriptors allowing wide interpretation

Solution

Add specific details about colors, materials, lighting angles, camera settings, and composition rules (rule of thirds, golden ratio).

Issue

Poor composition

Cause

No compositional guidance in prompt

Solution

Explicitly mention composition rules:

"Rule of thirds composition"

"Centered subject with symmetrical framing"

"Leading lines draw eye to focal point"

"Foreground, mid-ground, background layers"

Multi-Turn Editing Issues

Issue

Too many changes at once causing confusion

Cause

Requesting multiple edits simultaneously

Solution

Make one change per turn. Wait for result before next edit.

Example sequence

:

✅ "Change background to sunset"

✅ "Make the lighting warmer"

✅ "Add reflections on water"

vs.

❌ "Change background to sunset with warmer lighting and add reflections"

Issue

Losing context from earlier turns

Cause

Vague references without reinforcing key details

Solution

Briefly reinforce context: "In this mountain landscape, add a hiking trail in the foreground"

Prompt Validation

Before submitting a prompt, verify:

Content Completeness

Subject clearly identified (who/what)

Action or state described (what subject is doing)

Environment/setting specified (where)

Lighting described (source, quality, direction)

Mood or atmosphere indicated (emotional tone)

Style or medium specified (photography, watercolor, etc.)

Aspect ratio chosen (1:1, 16:9, 4:5, etc.)

Technical Specifications

For Photography:

Camera/lens mentioned (50mm, 85mm, wide-angle)

Camera settings if relevant (f/2.8, shallow DOF)

Lighting type (golden hour, studio three-point, dramatic side)

Shot type (close-up, wide shot, overhead)

For Art/Illustration:

Medium specified (watercolor, digital art, oil painting)

Technique mentioned (loose brushstrokes, sharp vector)

Color palette described (pastels, vibrant, monochrome)

Style reference if applicable (children's book, manga, minimalist)

Quality Checks

Uses complete sentences, not keyword lists

Specific rather than vague ("charcoal blazer" vs. "suit")

No conflicting style instructions

Text under 25 characters if included

Length appropriate: 50-100 words for balanced control

No contradictory elements (photorealistic watercolor)

Text Rendering Validation

If prompt includes text:

Total characters under 25

Maximum 2-3 text phrases

Text in quotes ("SUMMER")

Font style specified (bold, script, sans-serif)

Position explicitly stated (top, bottom, centered)

Text color contrasts with background

Testing Your Prompts

Quick Test

Generate image and evaluate:

Subject accuracy

Is the main subject as described?

Composition

Does layout match prompt intent?

Lighting

Is lighting source and quality correct?

Style

Does aesthetic match requested style?

Technical specs

Are camera/art specs honored?

Mood

Does image convey intended atmosphere?

Refinement Workflow

If image doesn't match expectations:

Step 1: Identify the gap

What element is wrong/missing?

Is it subject, lighting, style, composition, or mood?

Step 2: Use multi-turn editing

Don't regenerate from scratch

Make targeted edit: "Make the lighting softer"

One change at a time

Step 3: Refine prompt for future use

If you need to regenerate, add more specificity to weak areas

Save successful prompts as templates

Comparison Test

For critical images, generate 2-3 variations with slightly different prompts:

Version A

Medium detail (50-75 words)

Version B

High detail (100-150 words)

Version C

Different style/lighting approach

Compare results to find optimal prompt verbosity and approach.

Example: Complete Validation

Prompt

:

Photorealistic close-up portrait of elderly fisherman with weathered hands mending

fishing net at dawn. Seated on wooden dock with misty harbor in background. Soft

golden light from rising sun creates warm rim lighting on his profile. Shot with

85mm f/2.0 creating shallow depth of field, net and hands in sharp focus while

background gently blurs. Contemplative and peaceful mood. 4:5 portrait format.

Validation

:

✅ Subject: elderly fisherman

✅ Action: mending fishing net

✅ Environment: wooden dock at harbor

✅ Lighting: golden hour, rim lighting

✅ Mood: contemplative, peaceful

✅ Technical: 85mm f/2.0, shallow DOF

✅ Aspect ratio: 4:5 portrait

✅ Complete sentences: yes

✅ Specific details: weathered hands, wooden dock, misty harbor

✅ Length: ~85 words (optimal range)

✅ Style consistency: photorealistic throughout

Expected result

High-quality, detailed image matching all specifications. Troubleshooting Guide Problem Likely Cause Fix Blurry/low quality Missing technical specs Add camera, lens, "ultra-high resolution" Wrong colors Vague color description Specify exact colors, hex codes if needed Bad composition No compositional guidance Add "rule of thirds", "centered", etc. Missing elements Element mentioned too late Put critical elements early in prompt Generic look Keyword listing Rewrite as natural sentences Text garbled Too much text Reduce to <25 chars, simplify font Wrong style Conflicting instructions Choose one consistent style Unexpected objects Ambiguous phrasing Be more explicit and specific