Ask a generator for an “elegant dress” and it will hand you the average of every dress it has ever seen — which is to say, no dress in particular. Lounge portraits fail on exactly this line of the prompt more than any other, because the wardrobe carries the room’s whole claim to sophistication.
Name the fabric, then the construction
Velvet, satin, silk, lace — one fabric, stated first. Then construction: thin straps, a thigh slit, a draped neckline, a robe worn open over a bodysuit. Fabric tells the renderer how light should behave; construction tells it where the cloth goes. Between them, a dress appears.
One accessory with a job
Pearls at the throat, a hand on the brass post, a glass held loosely — a single accessory gives the hands employment and the portrait a period. What ruins wardrobe lines is abundance: jewellery, gloves, wrap, clutch and stole will be rendered as a costume, not an outfit.
Match the room’s hour
A gown described for midnight will fight a room lit for afternoon. The wardrobe line and the light line of the prompt are one decision, made once: this lounge works in the evening, and everything Celeste wears knows it.