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Gedianming Jeremy
Gedianming Jeremy

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A Prompt Is Not a Spec: A Structured Input Pattern for Image Generation

If an image model keeps making attractive but unusable assets, the issue is often not the model. The prompt is being asked to behave like a full production specification without any structure.

For repeatable visual work, use five fields before you write prose:

SUBJECT: What must remain identifiable?
JOB: What business or editorial task must the image perform?
SCENE: Where is it, and what is happening?
COMPOSITION: Camera, crop, aspect ratio, and copy-safe space.
GUARDRAILS: Things that must not appear or change.
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Here is a compact example for a product campaign:

SUBJECT: matte-black insulated water bottle, exact cylindrical silhouette
JOB: launch visual for a premium hydration product
SCENE: quiet sunlit kitchen, pale stone counter, one folded linen napkin
COMPOSITION: three-quarter view, bottle on right third, empty upper-left area for a headline, vertical 4:5 crop
GUARDRAILS: no hands, no extra labels, no warped cap, no readable generated text
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The JOB line is the key. Without it, there is no reason for the generator to preserve empty space instead of adding more visual detail. It also tells reviewers what matters: an asset can be attractive and still fail its job.

I separate two constraint types:

  • Identity constraints protect the product or reference subject.
  • Layout constraints protect the downstream use of the image.

Identity drift is obvious. Layout drift is just as expensive: no room for a CTA, a crop that breaks on mobile, or a focal point hidden behind UI.

Run the same structured input through several visual directions. Keep subject and job fixed; vary the scene or lighting. That creates a meaningful comparison rather than a collection of unrelated generations.

Pixonara brings prompt discovery, reference-driven generation, image and video creation, and output history into one workspace. The practical goal is not “ask for an image.” It is to build, test, and review a visual specification.

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