③ 参考户型图生成3D图像

③ 間取り図を参照して3D画像を生成する 次は、間取り図をもとにして3D画像を生成します。 ここでも画像生成AIのNano Banana Proを使用します。 まず、①で用意した間取り図をアップロードしてください。 その後、②で作成したプロンプトを入力して画像生成を指示します。 うまくいくと、間取り図を立体化したような3D画像が生成されます。 なお、生成結果に気になる部分があれば追加で修正を指示しましょう。 私の場合は、 「画像内の文字を消して」 「ドアを閉めて」 といった指示を出すことが多かったです。 細かく修正を重ねることで、より自然で見栄えの良い3D画像に仕上がります。 私が3D画像の生成に使用したプロンプトはこちら↓ -------------- # Optimized Image Generation Prompt ## 1. Core Concept & Objective A photo of a realistic 3D dollhouse model, completely roofless, viewed from a 90-degree top-down (bird's-eye) perspective, replicating the 1:1 layout of the provided blueprint `@img1`. The footprint is a wide horizontal rectangle (landscape), with north at the top. **DOOR RULE (important):** Every room keeps its door, and every door is fully CLOSED — rendered as a single flat solid slab that completely fills its frame, flush with the surrounding wall, with the latch side meeting the jamb so the doorway is entirely blocked. The quarter-circle arcs in the blueprint only indicate a door's swing direction; treat them as drafting symbols — place the closed door slab along the straight doorframe line at the base of the arc, and render the fan-shaped arc area as plain floor. Closet and cabinet fronts are also shown shut as flush flat panels. Never render any door, closet, or cabinet as open or ajar. **TEXT RULE (important):** The blueprint `@img1` is used ONLY as a geometric guide for walls, rooms, and furniture — it is NOT a visual to copy. Do NOT reproduce, trace, or imitate ANY printed words, room-name labels, letters, numbers, "6.0 J" marks, dimension lines, arrows, or the compass rose from the reference. Every rendered surface — floors, walls, furniture — must be completely blank with no writing or characters of any kind. ## 2. Subject Definitions ### 2.1 Residence Overview A modern single-story family residence in a wide rectangular footprint, containing 4 bedrooms, one bathroom, one separate toilet, one kitchen, and a large open-concept LDK (living + dining + kitchen) at the center, with an entrance and shoes closet on the east side. ### 2.2 Key Internal Spaces (Strict Layout Match — all doors and closets closed) - **Top-left — Bedroom 1:** double bed against the upper-left wall; a closed door on the lower wall to the LDK; a built-in closet on its right with closed sliding panels. - **Top-center — Bedroom 2:** bed against the top wall, a desk and chair on the left; a closed door on the lower wall; a closed closet on each side. - **Top-right — Bathroom:** a bathtub along the top wall and a vanity sink; closed door. - **Right of bathroom — Toilet:** a small room with a single toilet; closed door. - **Mid-left — Kitchen:** an L-shaped kitchen with a sink counter, a stovetop, and a refrigerator in the upper-left corner; open to the dining area; all cabinet fronts shut. - **Center — Dining Area:** a dining table with two chairs, between the kitchen and the living room. - **Center-right — Living Room:** a three-seat sofa, a coffee table, two single armchairs, and a media console / TV stand. - **East side — Entrance:** a genkan with a tiled entry floor, a closed front door, and a shoes closet with closed doors beside it. - **Bottom-left — Bedroom 3:** a bed and a desk; a closed door (with swing arc) connecting to the LDK; a closed closet along its top wall. - **Bottom-right — Bedroom 4:** a bed and a desk; a closed door; a closed closet along its top wall. All interior doors are flat closed slabs flush in their frames; all closets and cabinets are built-in units with fronts shut. Windows sit in the exterior walls exactly where shown. ## 3. Materials & Finishes Premium, cohesive interior materials. Seamless light hardwood flooring throughout the living spaces, beige tile at the entrance genkan, smooth matte plaster walls, and high-end fabric furniture. Neutral palette of warm grays, off-whites, and natural wood tones. Doors as flat matte white or light-wood panels flush with the walls. ## 4. Technical Specifications ### 4.1 Photography Style Professional Interior Photography, Architectural Digest style, flawless ultra-realistic rendering of a roofless dollhouse seen from above. ### 4.2 Lighting Bright, diffuse natural light pouring in through the windows, combined with warm, subtle recessed spotlights illuminating the center of each room. ### 4.3 Camera Settings Wide-angle architectural lens, zero lens distortion, high dynamic range (HDR), f/8 aperture, razor-sharp focus across the entire layout.

③ 参考户型图生成3D图像 接下来，基于户型图生成3D图像。 这里也使用图像生成AI Nano Banana Pro。 首先，请上传在①中准备好的户型图。 然后，输入在②中创建的提示词，并指示其生成图像。 如果顺利，会生成一张将户型图立体化的3D图像。 另外，如果对生成结果中有不满意的部分，可以追加指示进行修改。 就我而言，我经常会给出这样的指示： "删除图中的文字" "把门关上" 通过反复进行细致的修改，可以得到更加自然、更好看的3D图像。 这是我用于生成3D图像的提示词↓ -------------- # Optimized Image Generation Prompt ## 1. Core Concept & Objective A photo of a realistic 3D dollhouse model, completely roofless, viewed from a 90-degree top-down (bird's-eye) perspective, replicating the 1:1 layout of the provided blueprint `@img1`. The footprint is a wide horizontal rectangle (landscape), with north at the top. **DOOR RULE (important):** Every room keeps its door, and every door is fully CLOSED — rendered as a single flat solid slab that completely fills its frame, flush with the surrounding wall, with the latch side meeting the jamb so the doorway is entirely blocked. The quarter-circle arcs in the blueprint only indicate a door's swing direction; treat them as drafting symbols — place the closed door slab along the straight doorframe line at the base of the arc, and render the fan-shaped arc area as plain floor. Closet and cabinet fronts are also shown shut as flush flat panels. Never render any door, closet, or cabinet as open or ajar. **TEXT RULE (important):** The blueprint `@img1` is used ONLY as a geometric guide for walls, rooms, and furniture — it is NOT a visual to copy. Do NOT reproduce, trace, or imitate ANY printed words, room-name labels, letters, numbers, "6.0 J" marks, dimension lines, arrows, or the compass rose from the reference. Every rendered surface — floors, walls, furniture — must be completely blank with no writing or characters of any kind. ## 2. Subject Definitions ### 2.1 Residence Overview A modern single-story family residence in a wide rectangular footprint, containing 4 bedrooms, one bathroom, one separate toilet, one kitchen, and a large open-concept LDK (living + dining + kitchen) at the center, with an entrance and shoes closet on the east side. ### 2.2 Key Internal Spaces (Strict Layout Match — all doors and closets closed) - **Top-left — Bedroom 1:** double bed against the upper-left wall; a closed door on the lower wall to the LDK; a built-in closet on its right with closed sliding panels. - **Top-center — Bedroom 2:** bed against the top wall, a desk and chair on the left; a closed door on the lower wall; a closed closet on each side. - **Top-right — Bathroom:** a bathtub along the top wall and a vanity sink; closed door. - **Right of bathroom — Toilet:** a small room with a single toilet; closed door. - **Mid-left — Kitchen:** an L-shaped kitchen with a sink counter, a stovetop, and a refrigerator in the upper-left corner; open to the dining area; all cabinet fronts shut. - **Center — Dining Area:** a dining table with two chairs, between the kitchen and the living room. - **Center-right — Living Room:** a three-seat sofa, a coffee table, two single armchairs, and a media console / TV stand. - **East side — Entrance:** a genkan with a tiled entry floor, a closed front door, and a shoes closet with closed doors beside it. - **Bottom-left — Bedroom 3:** a bed and a desk; a closed door (with swing arc) connecting to the LDK; a closed closet along its top wall. - **Bottom-right — Bedroom 4:** a bed and a desk; a closed door; a closed closet along its top wall. All interior doors are flat closed slabs flush in their frames; all closets and cabinets are built-in units with fronts shut. Windows sit in the exterior walls exactly where shown. ## 3. Materials & Finishes Premium, cohesive interior materials. Seamless light hardwood flooring throughout the living spaces, beige tile at the entrance genkan, smooth matte plaster walls, and high-end fabric furniture. Neutral palette of warm grays, off-whites, and natural wood tones. Doors as flat matte white or light-wood panels flush with the walls. ## 4. Technical Specifications ### 4.1 Photography Style Professional Interior Photography, Architectural Digest style, flawless ultra-realistic rendering of a roofless dollhouse seen from above. ### 4.2 Lighting Bright, diffuse natural light pouring in through the windows, combined with warm, subtle recessed spotlights illuminating the center of each room. ### 4.3 Camera Settings Wide-angle architectural lens, zero lens distortion, high dynamic range (HDR), f/8 aperture, razor-sharp focus across the entire layout.