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Can I furnish my home in 3D before I move in?

Yes — but a 3D furniture placement is a sketch of whether something fits and looks right, not a guarantee. It tells you something a floor plan can't: how a room FEELS with the sofa in place. It doesn't tell you whether your actual sofa has exactly the dimensions the model uses.

Why is furniture a rectangle on the floor plan — but a shape in 3D?

It looks like an inconsistency, but it's a deliberate convention that architects used long before 3D software existed. On a floor plan, seen from above, the purpose is to show space: how much floor area the sofa takes up, and where the floor is left clear to walk. A labelled rectangle ("sofa 220×90") answers that faster than a detailed drawing of cushions and armrests, which would just clutter the lines.

In 3D, the purpose is different: to show how the room feels. A flat rectangle makes no sense there — you need to be able to see that it's a sofa, not a table. That's why furniture in a 3D view has its own simplified shapes (a sofa shape, a bed shape, a plant shape), while on the floor plan itself it stays a rectangle. It isn't two different data sets — it's the same piece of furniture, drawn to two different rules.

What can 3D furnishing do that a floor plan can't?

• Show height and volume. A floor plan shows that the wardrobe takes up 60×200 cm on the floor. 3D shows that it's also 220 cm tall, and so pokes up into a sloped ceiling.
• Show walking clearance in practice. It's easier to see on a 3D model whether you can actually swing a cupboard door fully open than to work it out from numbers on a drawing.
• Show light and shadow around a piece of furniture. Is the sofa standing in front of the window? You only see that once the room has an orientation and a sun.
• Give a sense a client or partner can understand without being able to read a floor plan. Most people are better at reading a room in 3D than a technical drawing full of lines and numbers.

How does furniture placement actually work?

Most apps that let you place furniture in a 3D model build on the same principle: the piece "snaps" to the home's own axes and surfaces. Push a bed towards a wall, and it automatically straightens itself to line up with the wall rather than sit at an angle. That makes it quick to place things reasonably — you don't have to nudge a dial by tenths of a degree to get a bookcase standing straight.

The snap function has a downside: it's only as good as the home's own geometry. If the wall in the model is drawn slightly out of true compared with reality, the piece of furniture inherits the same skew. That's rarely a problem visually, but it's worth remembering if you use the placement for more than just looking.

What's in a typical furniture catalogue?

A furniture catalogue in this kind of app isn't a list of real shop items with a brand and a model number. It's generic types: a two-seater sofa, a double bed, a dining table for six, a floor lamp, an indoor plant of a given height. The dimensions are set to whatever's typical for the type — not to the specific item you're considering buying.

That means the catalogue is good at answering "can a sofa even stand here, and do I have room to walk past" — and poor at answering "does exactly THAT sofa from THAT shop fit". For that last question, you need the actual dimensions of the item you're looking at, checked against what you've measured yourself in the room.

What can it not do — and where should you measure yourself?

• Your own furniture doesn't have standard dimensions. Your 15-year-old sofa might be 240 cm, not the catalogue-typical 220. Measure it before you trust that it's been "tried out" in the model.
• Material and finish are decoration, not data. A 3D sofa in a particular colour tells you nothing about how your actual fabric or leather sofa will look in the room's real light.
• Doors and moving day are a separate question. That the sofa can stand in the living room in the model doesn't mean it can get through the home's doors and stairs. That's a separate, very concrete question you should work out on its own.
• The model doesn't know about power outlets, radiators or underfloor-heating pipes unless you've noted them yourself. A bookcase in front of a radiator looks fine in 3D and is a problem in reality.

3D furnishing versus AR apps that show real products

There's another kind of furniture app: the ones where you point the camera at your own, real room, and a model of a specific item from a specific shop is overlaid on the image (augmented reality). The two technologies solve different problems. An AR app shows you that specific chair in your actual room, but only as well as the phone's camera can track the room in that moment — it doesn't remember the room afterwards, and you can't measure against it.

A 3D furnishing tool inside a home model shows you a generic type of furniture inside a measured, saved model of the home. It's weaker at showing you the exact item you're considering, but stronger at saving the result, sharing it, and building on it — for example alongside a budget or a takeoff list for a contractor.

What HouseSense does

In HouseSense, the furniture catalogue comes along when you "walk inside" the home's 3D model: plants, lamps and furniture snap to the walls and the home's own axes, so they're easy to place sensibly. On the floor plan itself, the same pieces are drawn as flat rectangles — the architect's convention — while in 3D they have their own recognisable shapes. That requires an editable house, meaning one you've scanned or drawn yourself, not a home you've only received as a shared view.

Should you trust it before you buy furniture?

Use it to decide whether and where — not to decide exactly which item. 3D furnishing is excellent for seeing whether a double bed can stand in the room you call the bedroom at all, and whether there's room to walk around it. It's not a substitute for measuring the actual bed and checking it against your own, measured figures for the room, before you press "buy".