How to visualize furniture in a room.

A furniture selection is easy to like on a board and hard to judge in a space. On a white background, a green velvet sofa, a yellow console and a blue armchair look like a confident mix; in a narrow living room with pale oak floors and beams, the client has to imagine how much colour that really is, how big the sofa reads against the window, and whether the rug fills the seating area.

Seeing the pieces in a photo of their own room answers those questions before anything is ordered. It is the image that turns "I trust you" into "yes, that one", and it is often the difference between a quick decision and a second round of samples.

It also helps the designer. Placing the selection in the real light of the room shows clashes a board hides: a lacquered piece that will reflect the window, a dark table that disappears against a dark floor, a pendant that fights the ceiling beams. Better to see it in a picture than after delivery.

In Photoshop, each product photo is cut out, scaled and placed on the room photo, then warped to match the perspective of the floor. The old furniture underneath has to be removed and the floor and wall behind it rebuilt by hand, plank by plank. Then come the shadows, painted under each foot, and the colour match, since a product shot under studio light never sits right in a room lit by a window. A convincing image of one room takes a few hours, and the hardest part is that product photos are rarely taken from the same angle as the room.

In 3D, the room is modelled from measurements (walls, openings, floor, beams), the furniture is downloaded from the manufacturers or modelled when no file exists, materials are set up, the scene is lit to match the daylight, then rendered. The result is accurate and can be viewed from any angle, but it is a day or more of work, and it shows a render of the room, not the room as the client knows it.

Both methods make it slow to compare options. Trying a second sofa, or a second complete selection, means doing a good part of the work again, so in practice clients see one version, or none at all and decide from the moodboard.

The moodboard decides what the new pieces are, so make each one easy to read. Products cut out on a plain white or light background, with space between them, give the most faithful copies: the silhouette, colour and material of each piece are copied as they appear. A board where products overlap, or a photo of a furnished showroom, still works, but the pieces are harder to separate and their walls and floor are ignored.

Prefer a few large pieces to a full shopping list. A sofa, an armchair or two, a coffee table, a rug, a console and a pendant make a clear selection. Dozens of vases, books and cushions in a busy moodboard can be simplified or left out.

The room photo decides where things go. Each new piece takes the place of an existing piece that does the same job: the moodboard sofa where the sofa is, its armchair where the armchair is, its rug under the seating group. So the room needs a piece of the same kind to replace. If the moodboard has a dining table and the photo has none, the dining table will not appear; if the room has dining chairs and the moodboard has none, the chairs stay. Pairs follow the room: two armchairs in the photo give two copies of the moodboard armchair.

Shoot the room in daylight, from a standing height, straight and level, with the area that will change fully in frame. The template keeps the framing exactly, so frame it the way you want to present it.

The room stays the room. Camera, framing, walls, ceiling, floor, windows, doors and daylight are kept, and so is everything fixed to the building: built-in units, kitchens, fireplaces, radiators, curtains, blinds and artworks on the walls. Only loose furniture and objects change, and every new piece comes from the moodboard.

Not every piece of the moodboard is used. The room keeps about as many pieces as before, so products with no matching spot are left out. A piece of the room with no counterpart in the moodboard stays exactly as it is: in the example on this page, the black floor lamp and the woven pouf had no equivalent on the board, so they are still there next to the new sofa and armchair. If you want a piece gone, give it a counterpart in the moodboard.

Small objects can be simplified. Cushions, vases and plants are placed, but in a busy moodboard their patterns and exact shapes may not be copied as faithfully as a sofa or a rug. Scale is judged against the room (door height, window sills, worktops) rather than from product dimensions, so it is believable, not measured.

It is a presentation image, not a fitting plan. Check that each product reads as itself and that the room has not shifted before sending it to a client, and confirm dimensions with the manufacturer before ordering. When the exact layout of a new floor plan has to be shown, or a room must be seen from several angles, a 3D model is still the right tool.