World Labs
World Labs · Other
World Labs is a spatial intelligence company building frontier world models that perceive, generate, and interact with 3D environments. Its flagship product, Marble, is a 3D world generator that turns text prompts, images, video, and 3D layouts into persistent, editable worlds you can walk through in a browser. It handles text to 3D and image to 3D world creation from a single prompt or a reference shot. Studios use it for game level mockups, VFX previsualization, and robotics simulation data, while the World API lets developers generate explorable 3D scenes straight from their own applications.
About World Labs
What Is World Labs
World Labs is a research-driven company working on spatial intelligence, the idea that AI should understand and build 3D space, not just text and images. The team is led by Fei-Fei Li, and it raised a major funding round in early 2026 to push its world model research forward. If you follow AI news, you've probably seen the phrase "world model" thrown around a lot. World Labs is one of the few teams shipping an actual product around it.
That product is Marble. Feed it a sentence, a photo, a short video, or a rough 3D layout, and it builds a full 3D scene with consistent geometry you can move around inside. Unlike a 360 photo or a typical AI image, the output has real depth. Walk behind objects. Look around corners.
The catch is scope. Marble isn't a full game engine or a modeling tool like Blender. It's a generator and an editor for worlds, and it works best as a first pass you refine elsewhere. It runs in the browser, so heavy scenes depend on your connection and your machine. Treat the free tier as a test drive, not a production line.
Getting Started
- Go to marble.worldlabs.ai and sign up for a free account.
- Pick an input: type a text prompt, upload an image or short video, or start from a 3D layout.
- Generate the world and let Marble build its 3D geometry.
- Edit, expand, or combine the scene with the interactive tools, then export it as a Gaussian splat, mesh, or video.
- For programmatic use, grab an API key from the World API and wire generation into your own app.
Product Information
A quick look at World Labs's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Game designers who need quick 3D environment concepts before committing to a full build, as long as they can export to their existing pipeline.
- VFX and animation artists who want fast previsualization of a set or location from a reference image.
- Robotics and AI researchers who need synthetic 3D scenes for training and testing simulation, using the World API for scale.
Tasks
- Turning a mood board image into an explorable 3D location you can study from any angle.
- Prototyping a game level layout and iterating on it in 2D and 3D without a modeling suite.
- Generating consistent environments with the World API for research datasets and simulations.
Scenarios
- Early concept work for a film or game where a director needs to "walk" the space before art is locked.
- Building a larger world by generating separate scenes and combining them into one environment.
- Testing a robotics policy in a realistic simulated setting that mirrors a real location.
Key features
Multimodal World Generation
Marble takes text, images, video, or coarse 3D layouts and lifts any of them into a full 3D world. This matters because you don't need a perfect prompt or a clean photo to start. A single reference image is often enough. That's it. A single shot gets you a coherent space.
Interactive Editing in 2D and 3D
You can tweak specific elements or reshape an entire scene after it's generated. That's the difference between a one-shot render and something you can iterate on. What does that look like in practice? Change a building's position, adjust the terrain, or rework a section without starting over.
Expand and Combine Worlds
Generated worlds can be expanded and stitched together into larger environments. For anyone building an immersive experience, this is how you get past the single-room limit of most AI 3D tools and assemble something with real scale. Big difference.
Versatile Export Formats
Marble exports worlds as Gaussian splats, meshes, or videos. Gaussian splatting, one of those formats, is great for fast, photoreal viewing, while meshes drop straight into standard 3D pipelines. Both come from one generation. That saves a conversion step before your artists touch the asset.
The World API
The World API is a public interface for generating explorable 3D worlds from text, images, and video inside your own applications. It's what turns Marble from a web tool into something you can build a product on, whether that's a design app, a research pipeline, or an internal tool. Straightforward, and useful.
Marble Labs
Marble Labs is a creative hub with case studies, tutorials, and documentation that show how artists, engineers, and designers use the tool. It's a useful starting point if you learn better from worked examples than from a feature list. Worth a look.
Pros and cons
Pros
- Handles text, image, video, and 3D layout inputs, so you're not locked into one starting point.
- Worlds keep consistent geometry, which means you can actually explore them instead of only looking at a flat render.
- Editors and exporters cover both quick viewing (splats) and production pipelines (meshes) from a single generation.
- The World API opens the door to building your own 3D generation features on top of it.
- Runs in the browser with a free tier, so trying it costs nothing but time.
Cons
- It's a world generator, not a full modeling suite, so fine detail still gets finished in tools like Blender or a game engine.
- Heavy or complex scenes lean on your browser and connection, and performance can drop on weaker machines.
- Exact pricing above the free tier isn't clearly documented on the marketing site, so you'll want to check inside the app before committing.
Frequently asked questions
World Labs builds world models, which are AI systems that generate and understand 3D space. Its first product, Marble, creates explorable 3D worlds from text, images, video, or 3D layouts.
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