Belgrade Arbor puts the sun on a slider in its 3D site
Square43's site for a New Belgrade building opens on a pencil sketch and ends in a 3D model where buyers pick the hour and watch the light move.
Belgrade Arbor is a 3D real estate website that lets you drag the sun across a building that doesn't exist yet. Square43 Studio built it for a residential and business block on Bulevar heroja sa Košara in New Belgrade, and it took awwwards Site of the Day on 17 October 2026 with a 7.22, plus the Developer Award.
The whole site argues one thing: you can judge a flat before the concrete is poured. Every page is a step toward that, and the 3D model is where it lands.
A sketch that turns into a building
The home page opens on a cream ground and a few pencil lines. Two columns, a curve for the roof, a baseline. Then the drawing fills in. Dimensions appear in handwriting, the facade gets its branching openings, trees grow behind the glass, and the sketch hardens into a render with sky behind it.
It's a short intro, and it does the job a sales brochure needs ten pages for. You watch the architect's idea become the building, so by the time the render settles you already know where the facade came from. The facade is the brand here: concrete bands that split like branches, which the copy calls a canopy. The logo is the same shape, cut down to a small gold mark in the middle of the menu bar.
The 3D model with a clock on it
The 3D Experience page is why the jury gave it the Developer Award. The block sits on its real street, cars in the lanes, the two wings marked A and B on a small plan in the corner. Around that plan are ten camera points. Pick one and the view swings to that angle.
Along the bottom runs a bar with three controls: a properties menu, filters, and a time slider with a sun at one end and a moon at the other. It reads 10:00 am when you arrive. Drag it and the shadows walk across the facade and the street.
That slider is the best idea on the site. A buyer's first question about a flat is where the light falls, and a floor plan answers it with a compass arrow. Here you set the hour and look. The interface stays quiet while you do it: pale panels, small caps, one green handle, so the model keeps the attention.
Serif titles over people walking past
The inner pages swap the cream for footage. Residences and Business Spaces each open on a slow interior shot, a figure blurred as they walk through the room, with the page name set huge in a high-contrast serif in pale gold. The letters overlap the furniture and stay put while the person crosses behind them.
The blur matters. A sharp model posing in a kitchen would read as stock. A blurred figure reads as someone living there, and keeps your eye on the room and the type. The body copy beneath is small and plain, set in a clean sans, so the serif carries all the voice.
Where it gets ordinary
Usability scored lowest, at 6.84, and you can feel why. The Residences page drops from that title into a filterable list of 208 units, 1 BR to 4 BR, Wing A or Wing B, garden balcony or not. It works, and it reads like a spreadsheet after a page that felt like walking through the building. The type, the footage and the gold all drop away at the point where a buyer starts comparing.
That's the one seam that shows. The pieces are all there: the sketch that explains the facade, the footage that sells the rooms, and a 3D model that answers the light question better than any floor plan. Square43 made the model good enough that you want every other page to lead back to it.
