Whole environments, explorable
Text, a single image, multi-image sets, 360° panoramas, video, or coarse 3D blocking become persistent walkable worlds — Gaussian-splat environments, not single objects.
Model family · 3D
Not a backdrop. A place.
Marble — from World Labs, the spatial-intelligence company founded by Fei-Fei Li — generates persistent, explorable 3D worlds as Gaussian splats: environments you walk through, not stills you look at. In MML ONE, generated worlds load straight onto the 3D stage as film sets.
By World Labs
What it's best at
Worlds you can walk through.
What Marble does best, per World Labs' own docs — a different tool class from object generators.
Splats plus a collider
Every world exports as SPZ/PLY splats (~2M splats) with a physics collider mesh, a 360° panorama, and optionally a high-quality textured mesh.
The 1.1 line
Marble 1.1 (April 2026) is the recommended default; 1.1 Plus auto-expands 3D coverage for the largest worlds.
A public World API
World generation went programmable in January 2026 — MML ONE uses it to drop generated worlds straight onto the 3D stage, splats and collider together.
Editable after the fact
Pano edits, expansion beyond the original boundary, variations, and composing multiple worlds into one larger environment.
In MML ONE
Two Marble tiers, ready to route.
Exactly what our catalog serves today — vendor names.
Marble 1.1The recommended default for world generation.
Marble 1.1 PlusThe expanded tier: auto-extends 3D coverage for the largest worlds. In the catalog today, not yet self-serve.
Worlds arrive on the 3D stage as Gaussian splats plus a collider mesh — the set you block scenes on. The in-app catalog is the live truth.
In the MML ONE flow
Where Marble earns its place.
Generated worlds load onto the 3D stage as sets: walk them, place characters and props, and block coverage with a virtual camera before a single frame is generated.
The honest part
Know before you route.
The output is a radiance-field splat, not a production mesh: no PBR materials or relighting, and the high-quality mesh export takes up to an hour, rate-limited.
Generation is asynchronous on a minutes scale — this is not a real-time system.
Fidelity degrades away from the generation viewpoint; the largest coverage needs 1.1 Plus or deliberate expand-and-compose passes.
Public Alpha
Bring one film into the graph.
Start with a premise, a screenplay, or a folder of references. We'll set up your provider keys and walk through the first scene with you.