Style vocabulary is prompt vocabulary
Interior design's named styles are extraordinarily effective prompt anchors because each one compresses dozens of decisions into a word: japandi (light wood, low furniture, muted warmth), wabi-sabi (imperfect textures, aged materials), brutalist (raw concrete, monumental forms), mid-century modern (teak, tapered legs, saturated accents). Start from the style term, then layer specifics: "japandi living room, white oak floor, linen sofa in oat, paper lantern pendant, one ceramic vase". The more precisely you name materials, the more photoreal seedream-v45's render reads.
Light is the real design decision
The same room lives differently at 8am and 8pm, and clients rarely imagine that until shown. Specify time of day and light source in every prompt — "soft morning light through east-facing windows" versus "warm evening lamplight, dusk-blue windows" — and generate the same concept in both conditions. The WINDOW LIGHT preset gives interiors that quiet, naturally-lit editorial quality that sells a scheme. Presenting a concept across two lighting states is a five-minute move that reads as deep professionalism.
Iterate palettes and present like a studio
Once a room's composition works, hold everything constant and vary one dimension per generation: swap the palette from oat-and-oak to charcoal-and-walnut, or trade the coffee table style, keeping the rest of the prompt identical. Present clients three coherent variations rather than one take-it-or-leave-it render. For real client rooms, start from a photo with Nidhogg's editing tools to explore changes to the actual space rather than a fictional one.