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Riso City Poster, made with GPT Image 2.5 Sunburst
Example made with GPT Image 2.5 Sunburst

Text to imageArt & posters

GPT Image 2.5 Sunburst poster design promptRiso City Poster

The exact text-to-image prompt behind this picture, made with GPT Image 2.5 Sunburst.

Prompt

Vertical 2:3 poster frame. Risograph print poster of a hilly seaside city with stacked houses, a funicular and sailboats, printed in three inks: fluorescent pink, teal and plum, visible grain, slight misregistration and overprint where colors overlap, bold title at the top that reads "SUMMER HOURS", clean modern layout, no other text.

Prompts are kept in their original English to help reproduce the example. Copy one as it is, or adapt it for your project.

Make one like this

Opens GPT Image 2.5 Sunburst with this prompt and the settings below filled in.

135 tested GPT Image prompts →

Settings

Mode
Text to image
Aspect ratio
2:3
Quality
high
Price
From 2 credits

The exact price shows before you generate.

Make your own version

  1. The words in quotes, "SUMMER HOURS", are printed in the picture. Keep them short and change them to your own.
  2. Vertical 2:3 poster frame sets the whole feel of the shot. Swap it for another camera style to change the vibe.

Style prompt guide

Style traits to keep

A stylized coastal travel poster rendered in the tactile aesthetic of spot-color risography. GPT Image 2.5 Sunburst excels here because it accurately reproduces physical print defects like stipple grain and color misregistration while rendering crisp letterforms for the headline text. The strict three-ink restriction forces the model into high-contrast graphic layering instead of photorealistic gradients.

Risograph art mimics the charming limitations of Japanese stencil duplicators from the 1980s. Four visual qualities define this look in the generated output.

Texture
Visible grain and halftone speckling simulate ink soaking unevenly into uncoated, fibrous paper stock.
Registration
Slight mechanical misalignment leaves tiny white gaps and offset color halos around crisp object edges.
Palette
Fluorescent pink, teal, and plum act as semi-transparent spot inks that produce optical third colors where they overlap.
Composition
Flattened graphic perspective and strong silhouette blocking replace realistic light and shadow gradients.

What defines this look

  1. medium and primary subjectVertical 2:3 poster frame. Risograph print poster of a hilly seaside city

    Establishes the printed medium and overall composition. Removing risograph causes the generator to default to a digital painting or realistic photograph.

  2. scenic compositional detailswith stacked houses, a funicular and sailboats,

    Provides distinct architectural and transit elements that give the hillside depth. Omitting these leads to generic, empty coastal hillsides.

  3. spot color palette limitationprinted in three inks: fluorescent pink, teal and plum,

    Restricts the color gamut to three distinct spot inks. Changing or deleting this allows full-spectrum blending, ruining the signature riso look.

  4. print artifact instructionsvisible grain, slight misregistration and overprint where colors overlap,

    Commands the model to simulate mechanical printing flaws. Without this phrase, the output looks flat, smooth, and computer-generated.

  5. typography and layout constraintsbold title at the top that reads "SUMMER HOURS", clean modern layout, no other text.

    Directs headline placement, font styling, and exact wording. The final negative instruction prevents the AI from scattering illegible gibberish across the poster.

Same style, new subjects

Citrus Still Life

Swaps the landscape for an indoor kitchen still life while preserving the tactile three-color spot printing technique.

Prompt

Vertical 2:3 poster frame. Risograph print poster of sliced citrus fruits and a ceramic pitcher on a checkered table, printed in three inks: bright orange, mint green and midnight blue, visible grain, slight misregistration and overprint where colors overlap, bold title at the top that reads "MARKET DAYS", clean modern layout, no other text.

Tokyo Metro Street

Applies the risograph aesthetic to an urban evening scene using high contrast and layered linework.

Prompt

Vertical 2:3 poster frame. Risograph print poster of a busy crosswalk in a neon alley with an adult cyclist and overhead wires, printed in three inks: sunflower yellow, scarlet red and rich indigo, visible grain, slight misregistration and overprint where colors overlap, bold title at the top that reads "NIGHT SHIFT", clean modern layout, no other text.

Sunbathing Cat

Focuses on domestic foliage and an animal subject using earthy spot tones for a warm graphic poster.

Prompt

Vertical 2:3 poster frame. Risograph print poster of a sleeping cat curled among oversized potted monstera plants on a balcony, printed in three inks: coral red, olive green and deep navy, visible grain, slight misregistration and overprint where colors overlap, bold title at the top that reads "LAZY SUNDAY", clean modern layout, no other text.

Model and settings

Keep the 2:3 aspect ratio locked to preserve the traditional vertical proportions of screenprinted wall posters. Setting quality to high is essential so the model renders delicate paper grain and sharp typographic edges rather than blurring them. For square art prints or landscape wallpapers, adjust the aspect ratio to 1:1 or 16:9 while retaining the high quality mode.

  • Nano Banana ProChoose Nano Banana Pro if your poster design includes subheadings, credits, or complex graphic framing, as its layout-first generation ensures flawless typographic alignment.
  • FLUX.2 ProSwitch to FLUX.2 Pro if you want exact hex color control over your three ink layers while retaining readable headline text.

When the style drifts

The colors blend into muddy continuous photographic gradients.
Add the phrase flat spot color screenprint, no continuous tones and remove words like sunset or realistic lighting from the prompt.
The artwork looks too digital, slick, and completely vector-smooth.
Strengthen the texture cues by replacing visible grain with heavy soy ink stipple texture on fibrous uncoated paper.
Unwanted pseudo-text or illegible labels clutter the bottom of the poster.
Change the end of the prompt to strictly no additional typography, border text, or watermark marks.

Questions about this style prompt

Why does risograph art look better with only three ink colors?

Physical risograph machines print one ink drum at a time using specific spot colors. Limiting your prompt to three named inks forces the generator to mimic optical color blending and transparent overprinting, creating an authentic print shop look rather than a generic digital drawing.

What does misregistration mean in print prompts?

Misregistration happens when physical paper shifts slightly between printing passes of different colored drums. Describing this in the prompt creates the authentic offset borders, color gaps, and overlapping fringes found on genuine screenprints and indie zines.

Can I replace the title text with my own words?

Yes. Change SUMMER HOURS to any short phrase inside quotation marks, keeping it to two or three words for the clearest render. GPT Image 2.5 Sunburst handles short uppercase text accurately when guided by clear layout instructions.

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