Use Cases
Produce event, campaign and announcement posters with the typography included.
Short answer
To design posters with AI, use Ideogram or Flux: put the poster text in quotes and state the style and print format (A3 portrait, 2:3 ratio) in the prompt. Keep the text to three words or fewer; add longer copy in a design tool after generation. Print needs 300 DPI, so always upscale the output.
Posters are one of the jobs AI image generation handles best, because a poster combines one strong visual idea with a short piece of text — exactly what these models are good at.
Describing the atmosphere a concert flyer, an exhibition announcement or a campaign poster needs is much easier than describing a product from a specific angle. So your chances of a usable result on the first try are high.
Two technical issues need attention: text and resolution. Miss either and the poster looks good on screen but is useless at the printer.
State the poster's ratio in the prompt. A3 and A4 paper is roughly 1:1.41; for a vertical poster shared on social media, 2:3 or 4:5 works better. Changing the ratio afterwards breaks the composition.
Render only the headline in the image. Leave empty space for the date, address and details and add them afterwards — AI mangles letters in longer strings.
Screens need 72 DPI but print needs 300. A poster printed at A3 should be roughly 3500×4900 pixels; always run the generated image through an upscaler.
A poster that looks perfect on screen can print blurry, and the cause is pixel count, not design. Print shops want 300 DPI: an A3 poster needs roughly 3500×4900 pixels.
Most AI tools generate between 1024 and 2048 pixels. That is plenty for screen and not enough for A3 print. Upscalers close the gap; Midjourney, Leonardo and Recraft all have their own.
A practical rule: generate the poster at the highest resolution available, upscale by a factor of two, then zoom to one hundred per cent and inspect before printing. The edges of letters show most clearly whether the upscale worked.
The most common mistake in poster work is trying to have AI render all the text. A concert flyer carries the band name, date, venue, time, ticket price and sponsor logos; no model writes all of that without errors.
The right method is to split the job: render only the large headline — one or two words — in the image, and leave empty space in the composition for everything else. Adding an instruction like "empty lower third, flat colour" to the prompt guarantees that space.
You then add the remaining text in Canva, Figma or any design tool. That gives you error-free typography and lets you change the copy later — if the date moves, you do not have to regenerate the poster.
Yes, but you have to raise the resolution. Print wants 300 DPI; roughly 3500×4900 pixels for A3. Most tools generate 1024–2048 pixels, so run the output through an upscaler and inspect it at one hundred per cent zoom before printing.
Image models learn letters as shapes rather than as writing, which is why they succeed on short words and fail on long ones. The fix is to render only a one- or two-word headline in quotes and add the rest of the copy in a design tool afterwards. Ideogram and Flux are markedly better at this than the others.
If it will be printed, match the paper: A3 and A4 are roughly 1:1.41. If it is digital only, 2:3 or 4:5 works better because it occupies more space in a social feed. Set the ratio at generation time; cropping afterwards breaks the composition.
Prompts are written in English because most tools give markedly better results with English prompts.
bold concert poster, large text "GECE" at the top, silhouetted crowd under magenta and cyan stage light, heavy grain, 1980s screen-print aesthetic, high contrast, empty lower third for details, 2:3 ratio
Works well in these tools: ideogram, flux, midjourney
Note: Leaving the lower third empty lets you add date and venue details cleanly afterwards.
minimalist exhibition poster, single abstract sculpture centred on warm off-white background, thin swiss typography reading "FORM", generous margins, soft directional light, museum aesthetic, 1:1.41 ratio
Works well in these tools: ideogram, flux, midjourney
Note: Generous whitespace and a single object is the Swiss typographic poster formula, and it produces reliable results with AI.
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