Posterization reduces a photo’s smooth gradients to a fixed number of flat tone bands — the look of vintage travel posters, propaganda art and screen prints, where every color is a deliberate, separate layer of ink. It is one of the oldest graphic effects and still one of the most striking.
The Levels slider is the heart of it: at 2–3 levels the image becomes stark graphic shapes; at 5–6 it balances stylization and detail like a classic poster; above 8 it subtly simplifies while staying photographic. Portraits become iconic, buildings become poster art, sunsets become color-band compositions. Free, private, instant.
How to add the posterize effect to a photo
Tips for the best posterize look
- Strong, simple compositions posterize best — one subject, clear background.
- Increase contrast (in the Adjust tab) before judging low level counts; band placement depends on tones.
- Posterize at 3–4 levels, then pick your favorite band colors mentally and re-create the palette with Duotone for full control.
Posterize effect — FAQ
What does posterizing actually do?
Each color channel normally has 256 possible values, creating smooth gradients. Posterization rounds those values into a few discrete steps — your Levels setting — so gradients become flat bands with hard boundaries, like layers of printed ink.
Why is it called “posterize”?
Classic posters were printed with a small number of ink layers, so artists designed with a handful of flat colors. Reducing a photo’s tones recreates that printing constraint — hence the name.
What is the best level count?
For a graphic art look: 3–5. For subtle simplification that still reads as a photo: 8–12. There is no wrong answer — the slider previews instantly, so sweep it and trust your eye.