AI movie poster generator — key art, title, then a moving poster

A movie poster is one image doing three jobs at once: a key image that sells the mood, a title you can read from across a room, and a composition that leaves room for both. Until recently the second job meant a trip to a design tool. On eroq, the text-capable image models now letter the title for you, and the Animate button turns the finished poster into a moving one. This is the workflow for a short film, a festival entry, a pitch deck or a fan-made concept for your own story, from frame to clip.

1. Pick the frame

• 3:4 is the print-style poster: tall, with room for a title band. Closest of the five formats to a one-sheet.
• 9:16 is the phone-screen poster, for stories, a teaser or a vertical trailer card.
• 16:9 is key art for a landing page, a banner or the card at the end of a trailer.

Decide now if the poster will move later. Every video engine that takes a start frame renders 16:9 and 9:16 natively. A 3:4 poster is native on eroq's own Motion One. It is also native on the Seedance family, the Hailuo engines, Grok Imagine and Wan 3.0; on the rest, the clip snaps to the nearest shape the engine supports.

2. Write it as a poster brief

A poster prompt is not a scene description with a title bolted on. Write it in this order:

1. Genre and tone, in a phrase: coastal thriller, quiet family drama, cosmic horror.
2. One key image. A silhouette, a face, an object, a place. Posters with three heroes in a row look like cast photos.
3. Light and palette. One dominant source and two or three colours.
4. Where the type goes. "Across the bottom third", "in the empty sky at the top". Reserve the space in the image itself.
5. The title in quotes, with its style: tall condensed capitals, thin serif, brushed metal.
6. Optionally, one short tagline in quotes. Five or six words.

Leave out the billing block, the dense credits at the foot of a theatrical poster. Fine print is where image models stumble most; set it in your editor if you need it.

3. Choose the engine

• GPT Image 2.5 Flare is the default for genre posters: OpenAI's expressive model, positioned on eroq for silhouettes, rim light and heavy atmosphere, with the same text handling as its sibling. 31 credits / image.
• GPT Image 2.5 Sunburst costs the same and is the precise one: the sharpest in-image text of the lineup and controlled layouts. Pick it when the title is long or the composition is strict. The trade-off is laid out in Sunburst vs Flare.
• Flux 3 Image brings natural light and reliable typography, the right look for a drama or a documentary that should not feel staged. 32 credits / image.
• Nano Banana Pro is the finisher for a detail-heavy painted poster, at 124 credits / image, the priciest image model on eroq.

Render a batch of four: 124 credits on Flare, about $1.24 at the entry pack.

Example prompts

1. Thriller, Flare, 3:4. "Key art for a coastal thriller: a lone figure in a long dark coat on a rain-lashed pier at night, a lighthouse beam slicing through fog behind him, cold teal and sodium orange, low angle, heavy film grain, the title "NIGHT FERRY" in tall condensed white capitals across the bottom third, the tagline "Nobody gets off at the last stop" in small capitals above it." One silhouette, one light source, and a band reserved for the type.
2. Science fiction, Flare, 9:16. "A colossal ringed planet rising over a white salt desert, a single explorer in an orange suit casting a long shadow, dust haze and rim light, epic scale, the title "SALT & SILVER" in wide-spaced metallic capitals at the top." The tiny figure gives the planet its size, and the empty sky is the natural place for the title.
3. Drama, Flux 3, 3:4. "A quiet harbour at golden hour, an old fisherman mending a net on an upturned boat, gulls overhead, warm natural light, documentary photograph, the title "LOW TIDE" in a small clean serif in the empty sky at the top, lots of breathing room." Small type and real light read as a festival poster rather than a blockbuster.
4. Horror, Sunburst, 3:4. "An empty Victorian hallway lit by one flickering wall lamp, a door at the far end left ajar, peeling wallpaper, green-grey palette, symmetrical composition, the title "THE QUIET HOUSE" centred in thin white serif capitals with the tagline "Listen." beneath it." Symmetry and exact placement are Sunburst's ground; a one-word tagline stays legible.
5. Adventure, Nano Banana Pro, 3:4. "A hand-painted adventure poster of a red biplane banking through a jungle canyon, waterfalls and mist below, golden backlight, painterly brushwork with sharp detail, the title "THE LAST MAP" in bold carved-wood capitals across the top." Dense painted detail and a textured title are where the extra fidelity earns its price.

4. Proof, then fix one thing

Read the title letter by letter at full size, then the tagline. If no take of the four spells it right, change one variable (shorter title, capitals, bigger band) and run the batch again; legible text in AI images has the full loop. These engines render from the prompt alone, so a series of posters with the same lead needs a different tool: attach your keeper to Eroq One, which builds new shots from up to ten reference pictures.

Keep titles, characters and taglines your own. A real, identifiable person without their consent is banned by the acceptable-use policy, and providers may refuse prompts that imitate protected films. A refused prompt returns content_blocked and costs nothing.

5. Make it move

Open the poster from your History or Library, press Animate, and the video studio opens with the poster as the first frame and the format set to follow its shape. Then write motion, not the poster:

Rain drives sideways across the pier and the lighthouse beam sweeps once through the fog, his coat lifting in the wind, slow push-in from a low angle, the title lettering stays perfectly still.

Lettering can warp when the camera travels, so keep the move small. For a title that must stay rock solid, ask Eroq One's Edit mode to remove the lettering ("remove all the text, keep everything else"), animate that clean plate, and lay the title back on in your editor.

For the engine: Motion One is on every account with sound baked in, 60 credits for five seconds. Seedance 2.0 Mini is the cheap test at 45. Hailuo 3 (Creator plan) is the one for rain, smoke and physics. The full engine picture is in animate AI images to video and on the image to video page.

FAQ

Can AI make a movie poster with the title on it?

Yes. Put the title in double quotes with its style and position, and render on GPT Image 2.5 Flare, Sunburst or Flux 3 Image. Proofread every take before you keep one.

What size should an AI movie poster be?

Pick 3:4 for a print-style poster, 9:16 for phones and stories, 16:9 for key art and banners. Each format renders natively at the same price.

Can I turn the poster into a video?

Yes. Press Animate on the poster and it becomes the first frame of an image-to-video clip. Every video engine except Sora 2 Pro, which works from text alone, takes it.

Can I make a poster for a real film or with a real actor?

Stick to your own titles and characters. Real, identifiable people without their consent are banned by the acceptable-use policy, and providers can refuse prompts that imitate protected material.

Write the brief, quote the title and open the image studio.