Verified against Nano Banana / Gemini 3.1 Flash Image · 2026-08-02
Restyle a furnished room to a new design concept while keeping its architecture
Re-imagines an already-furnished room in a new interior style while locking its fixed architecture — windows, layout, structural walls — so the concept stays honest about what the existing space can actually become.
The prompt
Ready to copy — highlighted parts are example details you can swap.
You are generating an interior-design concept render from a photo of an existing, furnished room. The room's fixed architecture does not change — only furnishings, materials, and decor are being reimagined. ROOM PHOTO a living room with a large south-facing window, a fireplace on the left wall, and a doorway on the right leading to a hallway, currently styled in a mismatched mix of dated furniture, heavy dark curtains, and beige walls. ARCHITECTURE — DO NOT ALTER Preserve exactly as photographed: window position, size, and count; door position; ceiling height; any structural walls, columns, or built-in features; and the room's real proportions and the camera angle it was shot from. A design concept that secretly moves a window or widens the room isn't a usable concept — it's a fantasy the client can't actually build. ELEMENTS TO PRESERVE the fireplace and its stone surround should stay, though its mantel decor can change. Beyond the structural basics above, keep these specific existing elements in place as stated — if something isn't listed here and isn't part of the fixed architecture above, it's fair game to change as part of the restyling. TARGET STYLE Restyle the room's furniture, materials, color palette, and decor toward Scandinavian minimalism — light woods, white and soft grey tones, simple clean-lined furniture, minimal but warm textiles. Fully commit to this style's real, specific visual vocabulary — its characteristic materials, its typical color relationships, its furniture silhouettes — rather than a generic "modern" or "cozy" treatment that could apply to any style with the label swapped. BUDGET AND MATERIAL REALISM mid-range, achievable with off-the-shelf furniture from a mainstream retailer, not custom-built pieces. Keep the suggested furniture and materials within a register a client could actually source and afford at this level — don't render an aspirational showroom fantasy using materials or pieces far outside what was actually asked for, since a concept render's value is in showing a genuinely achievable direction, not a mood board with no real path to execution. LIGHTING Keep the room's existing light source and direction — the actual window position and any visible fixed lighting — as the basis for how the new furnishings are lit, so shadows and highlights on the new furniture and finishes look consistent with light actually entering this specific room from this specific window, not a generic showroom lighting setup. REALISM CHECK Every new piece of furniture and every material change needs to sit correctly within the room's real, unchanged proportions — a piece of furniture that would be too large to physically fit through the preserved doorway, or a rug that doesn't actually fit the preserved floor dimensions, should be flagged rather than rendered at a scale that ignores the room's real constraints. OUTPUT One restyled concept image with the room's real architecture completely intact and the new style applied convincingly to everything that was actually eligible to change.
Customize
Optional — swap in your own details for the highlighted parts above.
Why this works
Locking the room's fixed architecture — window position, doorway, ceiling height, structural walls — as a hard, non-negotiable constraint addresses the specific way an interior-restyling render's usefulness can quietly collapse: a client evaluating a Scandinavian-style concept for their actual living room is implicitly checking whether this is achievable in their actual space, and a render that subtly widens the window or repositions the fireplace to make the new style look better isn't showing them their room restyled, it's showing them a different, better room that happens to look similar, which sets an expectation the real renovation can never deliver on. Second, the instruction to commit fully to a style's real, specific visual vocabulary rather than a generic version of it matters because "Scandinavian," "industrial," and "mid-century" each have concrete, well-documented material and color conventions that differ meaningfully from each other and from a generic catch-all "modern" look, and a model that defaults to safe, generic styling under a vague style label produces a render that doesn't actually demonstrate what the requested style would look like in this room — undermining the whole point of asking for a specific named style in the first place. Third, the budget-and-material-realism constraint targets a documented failure of AI-generated design concepts specifically: an unconstrained render often defaults toward the most visually striking, aspirational version of a style — designer pieces, custom millwork, bespoke lighting — because that reads as more impressive in isolation, but a concept render whose actual job is helping a client plan a real renovation needs to stay honest about what's achievable at the budget and sourcing level they actually have, or the concept becomes aspirational marketing rather than a genuinely useful planning tool.
Verified against
Nano Banana / Gemini 3.1 Flash Image Gemini 3.1 Flash Image · 2026-08-02
Changelog
- 2026-08-02 — Initial publish, verified against Nano Banana (Gemini 3.1 Flash Image) restyling a dated living room toward Scandinavian minimalism.
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