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Free guide

How to Prompt for AI Image Generation

Write image prompts that get the picture in your head, not a random guess

  • 12 bite-sized sections
  • 3 min read
  • Free, no signup

Short answer

A free guide to prompting for AI image generation in 2026: the parts of a great image prompt, subject, setting, composition, lighting, camera and lens, style, color, text in images, aspect ratios, reference images, editing prompts, model differences, examples, and rules.

Updated

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Inside this guide

Short cards you can read in order or jump straight to. Tap the link icon on any card to share just that part.

01

Learn how image models read prompts

Modern image models, such as Nano Banana 2.1, GPT Image 2.5, FLUX 3 Image, and Midjourney, understand full sentences. Describe the image the way you would brief a photographer or illustrator: clearly and specifically.

If you can see it clearly, you can describe it clearly.

02

Cover the parts of a strong image prompt

Subject
Who or what, with the key details
Action
What the subject is doing
Setting
Where and when
Composition
Framing and camera angle
Lighting
Type, direction, and mood of light
Style
Photo, illustration, 3D, or painting
Color
Palette and color grade
Format
Aspect ratio and intended use
03

Make the subject specific

Vague
A woman in a cafe
Specific
A woman in her 30s, with short curly hair and a green wool coat, reading a paperback at a window table in a small Paris cafe
04

Set the composition and camera

  • Shot size: close-up, medium shot, or wide shot
  • Angle: eye level, low angle, or top-down
  • Lens: 35mm for a natural look, 85mm for portraits, wide-angle for drama
  • Depth of field: shallow to blur the background
  • Placement: subject on the left, room for text on the right
05

Choose the lighting and mood

  • Golden hour, soft window light, or a studio softbox
  • Hard sunlight for strong contrast
  • Neon or candlelight for a moody atmosphere
  • A named mood: calm, tense, joyful, or mysterious
06

Define a style without copying artists

Describe the style in your own words rather than naming living artists:

  • “Flat vector illustration with bold outlines”
  • “Soft watercolor with visible paper grain”
  • “Realistic product photo on a plain white background”
  • “Cinematic film still with muted colors”
07

Add text to images

  • Put the exact words in quotes
  • State where the text sits and how it looks
  • Keep the text short
  • Proofread the spelling in every result

A bold poster reading “SUMMER SALE” in large white letters across the top, on a bright coral background.

08

Pick the aspect ratio

1:1
Feeds and profile pictures
4:5
Instagram and Facebook feeds
9:16
Stories, Reels, and phone wallpapers
16:9
Thumbnails, banners, and slides
09

Use reference images

  • Upload a product or character image to keep it consistent across images
  • Name what stays: “Keep the product, label, and colors unchanged”
  • Name what changes: background, lighting, or outfit
  • Reuse the same references across a whole series
10

Edit with focused prompts

  • Change one thing per edit
  • “Turn the sky into a sunset and keep everything else the same”
  • “Remove the person in the background”
  • “Make the jacket navy blue”
11

Study a full example

A close-up product photo of a matte black water bottle on a wet granite rock beside a mountain stream, morning mist, soft side lighting, shallow depth of field, cool blue and green tones, realistic, room for text on the left, 4:5.

12

Use images responsibly

  • Do not make realistic images of real people without their consent
  • Do not copy existing logos, characters, or brands
  • Label realistic AI images wherever platforms require it
  • Read each tool’s commercial-use terms

The golden rule

Do not type a few words and hope. Describe the subject, setting, light, style, and format. Then refine one change at a time.

  • Subject
  • Setting
  • Camera
  • Light
  • Style
  • Text
  • Format

Take your last image prompt, add camera, lighting, and format details, and compare the two results.

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Frequently asked questions

The quick answers, if you just need the gist.

What does “How to Prompt for AI Image Generation” cover?
It has 12 sections, starting with “Learn how image models read prompts”, “Cover the parts of a strong image prompt”, “Make the subject specific” and “Set the composition and camera”, plus 8 more sections.
How long does it take to read?
About 3 minutes. Every section is a short, self-contained card, so you can jump straight to the part you need.
Is this guide free?
Yes. The full guide is free to read on this page, with no sign-up.
When was this guide last updated?
It was last updated in October 2026.

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