What Is AI Image Generation?

By Pip, your lighthouse keeper · 2026-05-15 · 2 min read

Hello, Pip here, with ink at the ready, which feels rather fitting today. AI image generation simply means you type a description in words, and the AI draws you a picture to match. "A cosy lighthouse at sunset with a sleepy octopus on the rocks," and a few seconds later, there it is.

Here's the gentle truth of how it works, no jargon needed. The AI has looked at enormous numbers of pictures alongside the words that describe them, so it has learned what "sunset" and "cosy" and "octopus" tend to look like. It isn't copying one photo. It's more like a chef who has tasted thousands of soups and can now whip up a new one from a few ingredients you name. The picture it gives you is brand new, built to fit your words.

How to ask for a better picture

The more you describe, the closer it lands. Don't just say "a dog." Say "a small scruffy brown dog sitting in a sunny garden, watercolour style." Mention the mood, the colours, the style, even the time of day. And if the first try isn't right, just adjust: "make it warmer," "fewer flowers," "from further away." It's a conversation, not a one-shot wish.

Two honest cautions. First, AI famously fumbles fine details, hands with too many fingers, wobbly text, jumbled clocks, so check anything that matters. Second, the pictures aren't real photographs, so please don't treat an AI image as proof that something truly happened. They're for imagining, decorating, and playing.

Have a go at describing the silliest scene you can dream up and see what comes back. The gap between a muddy picture and a magical one is almost always in the words you choose, and there's a real craft to choosing them well. Come and learn it with me.