Gaussian splatting in real estate is a capture-and-render technique that turns a few minutes of phone or drone video of an existing property into a photoreal 3D scene you can fly through in a browser in real time. It represents space as millions of tiny colored ellipsoids, or splats, instead of the flat triangles older 3D models use (INRIA, SIGGRAPH 2023). The method went mainstream when Zillow shipped SkyTour, the first major real estate portal feature built on it, in July 2025 (Inman, 2025). There is one catch that decides where it fits: 3D Gaussian splatting captures what already exists, so for a pre-construction unit that has not been built, there is nothing to scan. That is the line my team at R2U, a Brazilian proptech company specializing in immersive sales experiences for real estate developers, works on every day, and it is why renders and full-scale AR stay the fit for off-plan sales.
What Gaussian Splatting Is, in Plain Language
3D Gaussian splatting (3DGS) is a way to reconstruct a real scene from ordinary photos or video and play it back as a smooth, photoreal 3D model in real time. You walk a phone or fly a drone through a space, the software solves where the camera was in each frame, and it fills the scene with millions of soft, semi-transparent ellipsoids that blend into walls, glass, plants, and reflections.
Each splat carries a position, a size, an orientation, and color encoded with spherical harmonics, which lets it shift appearance with your viewing angle, so glossy floors and windows look right as you move (INRIA, SIGGRAPH 2023). The renderer sorts and rasterizes these splats front to back, which is far lighter than ray tracing. That is why a scene runs at 30 to 120 frames per second on consumer hardware, and recent browser engines built on WebGPU play splat scenes with no app and no plugin.
The practical takeaway for a developer or marketer: 3DGS gives you a capture pipeline. Point a camera at a real, finished space, wait for processing, and you get an explorable photoreal twin of it. R2U does not sell a gaussian splatting capture service. We build the experiences a developer needs before there is anything to capture, and I will get to exactly why that distinction matters below.
Why 2026 Is the Breakout Year
Two things turned 3DGS from a research demo into a real estate format this year: an open file standard and platform adoption. Before 2026, every vendor stored splats in its own format, so a scene built in one tool would not open in another. That is the kind of lock-in that keeps a technology niche.
In February 2026, the Khronos Group, which governs the glTF 3D file format, published KHR_gaussian_splatting as a release candidate, with formal ratification targeted for the second quarter of 2026 (Radiance Fields, Feb 3 2026). It is a candidate spec, not yet final, and the working group is still reviewing community feedback on compression. Contributors include Niantic Spatial, Bentley Systems and Cesium, Esri, and the OGC, which signals interoperability across mapping, geospatial, and web 3D (Khronos, 2026). A shared format means a splat captured once can travel between viewers, engines, and portals.
Adoption followed the standard fast. Zillow launched SkyTour in July 2025, using gaussian splatting to turn drone footage into a flyable exterior tour, the first time a major portal scaled the technique (Zillow, 2025). CoStar’s Apartments.com answered with exterior 3DGS support through Matterport 3D Exteriors (Lidar News, 2025). When portals at that scale ship a format, agents and capture studios follow. None of this is where R2U competes. Our 3D sales platform is browser-based and shares by link, so it lives in the same no-download world a splat viewer does, but it renders a building that does not exist yet.
Gaussian Splatting vs Photogrammetry vs CGI vs Interactive 3D
Here is the part that confuses most buyers: gaussian splatting, photogrammetry, CGI renders, and interactive 3D models all produce “3D,” but they start from opposite inputs and answer different questions. The split that matters is simple. Does the thing you want to show already exist?
The table below sorts the four techniques by input, output, whether they run in real time, and where each fits a real estate workflow. The deciding column is the last one.
| Technique | Input | Output | Real-time? | Pre-construction fit |
|---|---|---|---|---|
| 3D Gaussian splatting | Photos/video of a real space | Photoreal explorable scene | Yes (30-120 fps) | No: needs an existing space to capture |
| Photogrammetry | Photos of a real object/space | Textured mesh model | Usually offline | No: same limit, slower cleanup |
| CGI render | Architectural plans + materials | Photoreal still images | No (pre-rendered) | Yes: built from plans, no structure needed |
| Interactive 3D model | Plans + 3D modeling | Navigable model in browser | Yes | Yes: buyer explores an unbuilt unit live |
Gaussian splatting and photogrammetry are cousins. Both reconstruct a real scene from images. The difference is speed and realism: a crew can capture a property in hours and have a usable 3DGS asset the next day, while photogrammetry needs heavier mesh cleanup. 3DGS also handles reflections and foliage that break a triangle mesh (utsubo, 3DGS guide, 2026). CGI renders and interactive 3D are the other camp. They are built from plans, so they can show a building that has not broken ground. R2U lives in that second camp, and the photorealistic renders for pre-construction workflow is built around it.
Where 3D Gaussian Splatting Wins for Real Estate
3DGS is the best tool available for capturing an existing property in photoreal, walkable 3D. If the building stands today, splatting beats a render and a 360 tour on realism and on capture speed. Resale listings, occupied homes, finished amenity spaces, hotels, and landmark exteriors are its home turf.
The reason is what splats handle well. Glossy stone, water, glass curtain walls, dense landscaping, and complex daylight, the surfaces that make a photogrammetry mesh look melted, render cleanly because each splat changes color with the viewing angle. Zillow’s SkyTour leans into exactly this, capturing facades, pools, and grounds that flat photography and interior tours cannot convey (Zillow, 2025). For a finished building, that is a genuine upgrade.
Cost sits in a real-estate-friendly band. Professional 3DGS capture for a property starts around $2,250, with typical single-property projects running $2,250 to $5,000 and film-grade work reaching $50,000 and up (utsubo, 3DGS guide, 2026). Those are third-party market rates, not R2U pricing. I am citing them so the comparison is honest: for an existing asset, splatting is reasonable and fast. R2U’s 3D renders and interactive work answer a different need, which is the moment a buyer wants to step inside a unit that is still on paper.
The Pre-Construction Catch: You Cannot Splat a Building That Is Not Built
This is the whole point, and it is not a knock on the technology. Gaussian splatting and photogrammetry both require images of a real scene. A pre-construction unit has no scene. There is a concrete slab, rebar, and a floor plan. There is nothing to point a camera at, so there is nothing to splat.
For off-plan and pre-construction sales, which is where most developer revenue is committed before a building exists, that rules out capture-based methods entirely. You cannot drone-fly an apartment that is six floors of exposed structure. You cannot scan a kitchen the buyer is choosing finishes for when the kitchen is a line on a plan. The only way to show an unbuilt unit is to generate it from the plans: CGI renders for the hero images, an interactive 3D model the buyer navigates, and full-scale AR that drops the finished apartment onto the bare slab at real size.
R2U built its platform for exactly this gap. Our AR Staging renders a full-scale, fully decorated apartment in augmented reality at the construction site, so a buyer walks through it before a wall goes up, on a tablet or on Apple Vision Pro. Our 3D sales platform runs in the browser with floor selection, real views by floor level, sunlight simulation, and real-time finishing customization. A captured splat offers none of that, because a splat is a frozen recording of one real state. The two approaches do not compete. Splatting owns existing space; plan-based 3D owns unbuilt space.
The Right Stack for Off-Plan: Renders, Interactive 3D, and Full-Scale AR
For a pre-construction launch, the stack is plan-based from end to end, and each layer answers a different buyer question. Renders open the campaign, interactive 3D lets the buyer self-serve, and AR closes the gap between a screen and a real apartment.
Photorealistic CGI renders carry the top of funnel: the first ad, the brochure, the landing page. They sell the vision before anything exists, and they share assets with the interactive layer so a developer does not pay twice. An interactive 3D sales platform takes over when the buyer wants specifics. On R2U’s platform a buyer compares units, picks a floor, sees the real view from that floor, runs sunlight by time of day, and swaps finishes live, all in a browser the sales team sends by link. Full-scale AR is the closer. The buyer stands in the future apartment at real scale and reads the space the way no flat image can. To see how this layering plays against the broader format choices, the digital twin vs virtual tour comparison maps the tradeoffs, and the 3D sales platform guide details how the interactive layer works in a launch.
Where does 3DGS join this stack? After handover. Once a building is finished, a developer can splat the real amenities, the lobby, the model unit, and the views, and add a captured photoreal layer to the marketing for later phases or resale. That is the clean division of labor: generate it from plans while it is unbuilt, capture it with splatting once it stands.
FAQ
What is gaussian splatting in real estate?
Gaussian splatting in real estate is a technique that converts photos or video of an existing property into a photoreal 3D scene you can explore in real time, often in a browser. It represents the space as millions of colored ellipsoids rather than a triangle mesh, which makes reflections, glass, and landscaping look realistic (INRIA, SIGGRAPH 2023). Zillow’s SkyTour, launched July 2025, is the first major portal feature built on it.
Is gaussian splatting better than photogrammetry?
For real estate capture, 3D Gaussian splatting usually beats photogrammetry on realism and speed. It renders in real time at 30 to 120 frames per second, handles reflective and organic surfaces that break a photogrammetry mesh, and produces a usable asset within about a day rather than after long mesh cleanup (utsubo, 2026). Both share the same hard limit: they need a real space to capture, so neither works for unbuilt pre-construction units.
Can you do gaussian splatting on a phone?
Yes. You can capture a 3DGS scene by walking a modern smartphone through a space, and recent WebGPU-based viewers play splat scenes directly in a phone browser with no app (Spheron, 2026 guide). The heavy processing that builds the scene still runs in the cloud or on a workstation. This is for capturing existing spaces; for an unbuilt apartment there is nothing to capture, which is where R2U’s browser-based, no-app 3D sales platform and full-scale AR apply instead.
Can gaussian splatting show a pre-construction apartment?
No. Gaussian splatting reconstructs a scene from images of something that already exists, and a pre-construction apartment has no physical space to photograph. To show an unbuilt unit you generate it from the plans with CGI renders, an interactive 3D model, and full-scale AR. R2U builds all three, including AR Staging that places a full-scale decorated apartment on the bare construction slab via tablet or Apple Vision Pro.
Is the gaussian splatting file format standardized?
Not yet, but it is close. In February 2026 the Khronos Group published KHR_gaussian_splatting as a release candidate for the glTF format, with ratification targeted for the second quarter of 2026 (Radiance Fields, Feb 2026). It is a candidate specification under community review, not a final standard. Contributors include Niantic Spatial, Bentley Systems, Cesium, Esri, and the OGC.
Does R2U use gaussian splatting?
R2U does not sell a gaussian splatting capture service. Our focus is pre-construction, where there is nothing to scan yet, so we generate experiences from architectural plans: photorealistic renders, an interactive browser-based 3D sales platform, and full-scale AR Staging delivered on tablets or Apple Vision Pro. Splatting and plan-based 3D are complementary. Capture handles finished buildings; R2U handles the unbuilt ones developers sell off-plan.
Written by
Giovanni Abeni
CTO — R2U
Giovanni Abeni has been CTO of R2U since the company's early years. A graduate of Escola Politécnica at USP, he worked at Espresso Labs and Converge before taking technical leadership at R2U. He owns the architecture of the platform that runs interactive models in the browser (WebGL), virtual staging in augmented reality, and spatial computing experiences with Apple Vision Pro. Under his technical leadership, R2U has delivered projects for companies including Mobly (+82% conversion), Tegra, Coelho da Fonseca, and Portobello.
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