Marble 1.1 is World Labs' default world model. Give it one input (a text prompt, a single image, a 360 panorama, 2 to 8 photos of a scene, or a walkthrough video) and it generates a navigable 3D Gaussian-splat world, returned as a compact .spz splat you can walk through, orbit, and export as a triangle or collider mesh. The balanced choice for finished environments: game level greyboxing, virtual production backdrops, arch-viz walkthroughs, and immersive VR scenes. Step up to 1.1 Plus for larger, higher-fidelity worlds.