Marble by World Labs

Marble is a generative world model built by World Labs that converts text descriptions, photographs, multi-image sets, short videos, 360-degree panoramas, and coarse 3D geometric layouts into persistent, explorable 3D environments. Unlike frame-by-frame generative video models, Marble produces a stable spatial structure upfront—a full 3D scene with consistent geometry, lighting, and materials that users can navigate freely without time limits or visual morphing artifacts. The pipeline generates a panoramic world proxy first, then resolves full 3D geometry and surface detail across the scene. Outputs can be exported as Gaussian splat files, conventional 3D meshes, or rendered videos, making them compatible with game engines, VR headsets including Apple Vision Pro and Meta Quest 3, and simulation platforms such as NVIDIA Isaac Sim via Omniverse NuRec. The experimental Chisel editor separates spatial structure from visual style: users block out walls, floors, and volumes using basic geometric shapes, then apply text prompts to define materials and appearance, giving fine-grained compositional control over generated environments. Game developers use Marble to generate explorable level prototypes from concept images or text descriptions, then import the exported meshes into engines like Unreal or PlayCanvas for further refinement and interaction logic. VFX teams use it to produce geometrically stable 3D backdrops that allow precise camera control, addressing the shot-to-shot inconsistency common in AI video generators. Discover more tools. Robotics companies including Lightwheel use Marble to generate diverse simulation environments from minimal real-world captures—such as a single 360-degree photo—reducing environment creation time from weeks to minutes for training embodied AI agents. Architectural and interior design teams generate spatial variants from reference images to explore layout and material options. Marble Labs, a creative hub launched alongside the general release, showcases production workflows from studios including Escape.ai, Rosebud, and VIVERSE. Marble's key technical differentiator is that it creates persistent, downloadable 3D assets rather than generating worlds procedurally on the fly, placing it in a distinct category from models such as Google's Genie. The platform offers a freemium model with a free tier that provides a limited number of world generations for experimentation, and paid plans for higher-volume use. Current limitations include reduced geometric detail in areas far from the original prompt image, and performance variability with illustrated or stylized inputs compared to photographic references. World expansion is currently limited to one extension per generated world, and the Chisel structural editor remains an experimental feature Browse alternatives.