Fei-Fei Li's Marble: 3d World Model for Spatially Consistent Virtual Environment
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3d World ModelingMultimodal AIVirtual Environments
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3d World Modeling
Multimodal AI
Virtual Environments
Fei-Fei Li's new startup, World Labs, has released Marble, a 3D world model that generates spatially consistent virtual environments from various inputs, sparking interest and discussion about its capabilities.
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Nov 13, 2025 at 2:48 AM EST
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The key idea: instead of generating a single object or clip, Marble outputs an entire spatially consistent environment that you can walk through, edit, grow and export as Gaussian splats / meshes / video for use in engines and VR. It also comes with AI-native editing tools and a hybrid 3D editor for blocking out geometry before refining details.
It’s being pitched as a step toward “spatial intelligence” — world models that reason about 3D space for creativity, robotics, and embodied agents. I’d love to hear from people who have tried it or who are building similar systems: what’s still missing for this to be production-ready?