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By Zespół Fattly AI6/26/2026 4 min read

How to generate an AI image from a prompt

In short

Generating images from a prompt is easier than you think. We show how to write a good prompt, pick a model and get exactly the result you want.

An AI image generator creates a graphic from a text description — a prompt. The better the description, the better the result. Here is how to generate an AI image step by step.

1. Write a specific prompt

Describe the subject, style, light and composition. Instead of a dog, write a photo of a red corgi dog on a meadow, golden hour, soft light, realistic. Adding a style (photo, illustration, 3D) and details improves the result significantly.

  • Subject — what should be in the image
  • Style — photorealism, illustration, 3D render, minimalism
  • Light and mood — e.g. studio, golden hour, dramatic
  • Framing — close-up, wide shot, aspect ratio (1:1, 16:9, 9:16)

2. Choose an AI model

Different models have different strengths. Fast and cheap ones are great for testing ideas; flagship models are for final, photorealistic graphics. Text-specialized models (e.g. Ideogram) render lettering on graphics better.

3. Edit your own photo (optional)

You don't have to create from scratch. Upload your own photo and change the background, colors, style or details with a prompt. This is edit mode (image-to-image), perfect for makeovers and variations.

4. Download and use

You download the finished image with one click. You can use it on social media, on a website, in an ad or a presentation.

Summary

A good AI image starts with a good prompt and the right model. Experiment with the description, test different models and edit your own photos. In FATTLY you have over 20 image models in one place.

Frequently asked questions

What is a prompt?

A prompt is a text description of what you want to see in the image. The more detailed it is, the closer the result is to your vision.

Can I write the prompt in my own language?

Yes. You can describe in your language — though some models understand English best, so for tricky scenes it's worth trying both.

Can I edit my own photo?

Yes. You upload a photo and the editing model transforms it per your prompt — e.g. changes the background or style.

How to generate an AI image from a prompt — guide | FATTLY