Write it like a call sheet. Five parts, always in the same order: framing, the person in two or three neutral details, the outfit garment by garment with fabric named, the light, the location. “Editorial lookbook photograph, full length, of a woman with dark curly hair wearing a boxy oversized ivory linen blazer, wide-leg taupe trousers and flat leather loafers, seamless warm sand backdrop, large softbox front left with a bounce card filling the shadows, 85mm at f/4.” The fabric words carry more than they look — linen, ribbed cotton, satin, bouclé and quilted nylon each drape and catch light differently, and the model knows that.
Two clauses are worth pasting into everything. “Plain unbranded garments with no prints, labels or lettering” stops the model inventing logos and slogan text, which it will otherwise do on any hoodie or trainer. And “natural skin texture, no beauty retouching” keeps faces out of the plastic uncanny valley that instantly reads as AI. Every image on this page is the unedited first output of the prompt beside it, generated on BananaBanana; the two flat lays cost three cents each.