A 3D metaverse space is an interactive environment that people explore in a browser or a headset, such as a showroom, a venue, a campus, a store or a copy of a real site. This guide explains how such a space is created, optimized, delivered and made useful, and how long the work usually takes.
Most of the work is art and optimization. A team creates or captures the environment first, then simplifies it until it loads in seconds and runs smoothly on the weakest device the project supports. This page covers the environment only. The guide to metaverse app development covers multiplayer, voice and backend systems, and the metaverse avatar guide covers characters.
Three ways to create a 3D virtual space
| Method | How it works | Typical use | Problems to plan for |
|---|---|---|---|
| Modeled by artists | Artists build the space in Blender, Maya or 3ds Max, or convert it from CAD or BIM files | Stylized spaces, planned buildings, anything users interact with | Artist time; CAD files carry far too much detail and need heavy cleanup |
| Photogrammetry or lidar scan | Many photos or a laser scanner produce a textured mesh of a real place | Copies of real sites, heritage buildings, real estate | Messy meshes, lighting fixed into the textures, large texture files |
| Gaussian splatting | Software turns photos or video into millions of soft 3D points that render like a photo | Photoreal viewing of real places and objects | No clean surfaces for collision or editing; engine and web support is still new |
Many projects combine methods. A splat or a scan provides the photoreal background, and modeled geometry provides the floors, walls and objects that users touch.
Gaussian splats now have a path to a standard file format. The Khronos Group published the KHR_gaussian_splatting extension for glTF as a release candidate on February 3, 2026. The extension stores each splat's position, orientation, scale, color and opacity, and viewers that cannot draw splats can show the data as a point cloud instead. CesiumJS, Babylon.js and PlayCanvas have added support, according to Radiance Fields.
The optimization pass
Visitors leave a space that loads slowly or stutters. The optimization pass addresses both problems with these steps:
- Geometry. Remove hidden faces, reduce the polygon count of dense meshes, merge static objects and create levels of detail for large items.
- Textures. Pack textures into atlases and limit resolution by how close users can get. Compress them with KTX2 and Basis Universal so they stay compressed in GPU memory.
- Lighting. Bake lighting and ambient occlusion into lightmaps instead of calculating dynamic lights at runtime. Use a few real-time lights only where objects move.
- Draw calls. Fewer materials and merged meshes reduce draw calls. Mobile phones and standalone headsets gain the most from this step.
- Mesh compression. Compress geometry in glTF files with Draco or meshopt.
- Streaming. Load the entrance area first and stream other rooms in as visitors walk toward them.
- Collision. Use simple invisible shapes for collision instead of the visual mesh.
File formats for a 3D metaverse space
| Format | Maintained by | Main use |
|---|---|---|
| glTF 2.0 (GLB) | Khronos Group | Real-time delivery to browsers and most engines |
| OpenUSD | Alliance for OpenUSD (AOUSD) | Large production and industrial pipelines, NVIDIA Omniverse, Apple platforms |
| Native source files | Tool vendors (Blender, Maya) | Editing; keep these under version control |
The Alliance for OpenUSD released the OpenUSD Core Specification 1.0 in December 2025. The specification defines OpenUSD's data model and its USDA, USDC and USDZ file formats. Export to glTF for web delivery, and keep the editable source files, because exported files alone are hard to change later.
Delivering the space
In the browser
Three.js, Babylon.js and PlayCanvas all load glTF and support both WebGL and WebGPU. WebGPU now runs in Chrome, Edge, Firefox and Safari, according to web.dev. Firefox support started on Windows with version 141, and Safari support started with version 26. A browser space opens from a link and can sit inside an existing website, and headset users can enter the same space through WebXR. Aim for a first interactive view within a few seconds on a mid-range phone, showing the entrance area while the rest loads.
Native app or cloud streaming
Unity and Unreal builds allow more detailed graphics, and most VR apps use one of these engines. Unreal's Pixel Streaming sends a high-end render to any browser as video, at the cost of one cloud GPU for each concurrent user.
| Delivery | Visitor needs | Visual limit | Running cost |
|---|---|---|---|
| Browser (WebGL or WebGPU) | A link | Set by the visitor's device | Static hosting and a CDN |
| Native app | An install from a store | Set by the device, but higher than the browser | Store fees and update releases |
| Cloud streaming | A link and a stable connection | Set by the cloud GPU | One GPU per concurrent visitor |
Making the space useful
An empty room gives visitors no reason to stay. Decide what visitors should do, and build the matching features:
- Inspect products. Clickable hotspots, product configurators and 3D product models.
- Attend something. Screens with live streams and stages for speakers.
- Meet people. Spatial voice zones where nearby visitors hear each other.
- Learn something. Guided tours and information panels.
Connect these features to a content management system (CMS), so editors can change content without a new build. Add analytics to see which areas people visit and where they leave.
Process and effort
- Define the purpose, the target devices and the performance budgets.
- Block out the layout with simple shapes and test how visitors move through it.
- Create or capture the environment.
- Optimize the scene, bake the lighting and export.
- Build the interactions and connect the CMS.
- Test on real devices and fix what the tests find.
One polished room or showroom usually takes a 3D artist and a developer about four to eight weeks. A campus with several areas or a detailed copy of a real site can take several months. The guides to the virtual art gallery and to metaverse events cover spaces built for those uses.
A 3D space rarely needs a blockchain. A blockchain helps when visitors own and trade items placed in the space, or when the space is a tokenized land parcel. The guide to Decentraland-style platforms covers tokenized land.
Frequently asked questions
Can I turn a CAD or BIM model into a 3D metaverse space?
Yes, but plan for a lot of cleanup. Engineering models carry far more detail than real-time rendering can handle, and they include hidden internal parts. The model needs polygon reduction, simpler materials and lighting work.
Are Gaussian splats ready for production?
For photoreal viewing, often yes. Khronos published a glTF extension for splats as a release candidate in February 2026, and web renderers keep adding support. Interactive spaces still need ordinary meshes for collision and interaction.
How big can a browser-based 3D virtual space be?
Size has no hard limit if the space streams areas as visitors approach them. The first download should still load within a few seconds on a phone.
Should the space be built for VR?
Build the space for screens first, then make it comfortable in VR. VR comfort needs real-world scale, a choice of teleport or smooth movement, and a steady high frame rate.