{
"subject": "a printed gig poster, seen straight on and whole, filling the entire frame, with no table, no wall and no mount around it",
"typography": "the ONLY words and numbers written in the image are VELUNA, SUMMER TOUR, SEPTEMBER 12, 9 PM and CENTRAL THEATRE. VELUNA goes at the top, in very large heavy condensed serif capitals, filling almost the whole width; just below it, much smaller, in light widely spaced capitals, SUMMER TOUR; at the foot, three short centred lines one under the other, in medium heavy capitals: SEPTEMBER 12, then 9 PM, then CENTRAL THEATRE",
"illustration": "in the middle of the poster, filling about half its height, a large stylised wave breaking from left to right, drawn with thick parallel lines and foam made of rounded curls; behind it a large plain full moon as a pale disc; to the right of the moon, six small birds in silhouette with open wings at different heights; below, the sea runs out of the wave in long parallel bands to the edge",
"composition": "a vertical poster in 3:4, with a pale paper margin all around and a thin rule just inside it; from top to bottom: band name, tour line, illustration, the block of three information lines and, at the foot, a pale band that is completely empty, about a tenth of the height",
"style": "a screen printed gig poster, few flat colours and thick outlines, simplified shapes and no three dimensional or photographic look at all",
"materials": "heavy paper with a light tooth and ink with fine screen printing breakup across the flat areas and the large letters",
"color_palette": "three colours only: dark petrol blue in the background, burnt orange in the wave, the birds and the band name, and cream in the paper, the moon, the letters at the foot and the band at the bottom",
"lighting": "no light source and no shadow: the colours are flat and the volume comes only from the outline and the lines",
"details": "the band name filling almost the whole width, the size hierarchy between the name, the tour line and the three lines at the foot, the whole moon behind the wave and the empty band at the bottom",
"negative_prompt": "any word or number other than the ones given, text in the bottom band, a watermark, a logo, a real brand, an existing band name, a human face, a photograph, a photographic gradient, a realistic shadow, a metallic sheen, a decorated frame, many colours, letters that are too thin, text touching the edge, AI artefacts"
}
How to use
A gig poster has to be read from three metres away and among ten other posters. This prompt builds the whole vertical piece: band name at the top, illustration in the middle, date, time and venue at the foot. It works in ChatGPT, Gemini and NanoBanana.
1. Swap the name, the date, the time and the venue in the typography field, and keep the line saying those are the only words in the image.
2. Write the names without accents in the request to the generator. It gets accents wrong on large letters, and the name comes out crooked.
3. Check the date and the venue character by character in the art. A poster with the wrong date has been printed by too many people already.
4. Ask for the same art to print and for the feed. The proportion changes, the drawing does not.
5. Leave the foot of the poster free. That is where the sponsor, the age rating and the ticket address go.
Tip: make the art with no words at all and ask for the text in a second pass, on top. With a long band name, that is the only way it comes out legible.
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