Li Feifei's Startup Unveils Marble: A Game-Changing 3D World Builder
World Labs Debuts Marble: The Future of Virtual World Creation

Imagine typing "sunset over a cyberpunk city" and watching a fully editable 3D environment materialize before your eyes. That's the promise of Marble, the groundbreaking new product from World Labs, the startup co-founded by renowned AI expert Li Feifei. Launched this week after securing $230 million in funding last year, Marble represents a significant leap forward in world modeling technology.
Beyond Simple Demos
While competitors like Decart and Odyssey offer free demonstration versions, Marble stands apart by generating persistent 3D environments that users can extensively modify. The platform tackles common issues like scene distortion head-on while supporting multiple export formats including Gaussian splats, meshes, and videos.
"We're not trying to replace traditional game development," explains Justin Johnson, World Labs co-founder. "Instead, we're giving creators powerful new tools to integrate into their existing workflows."

Smart Tools for Creative Minds
The secret sauce? Marble's built-in AI editing system lets users sketch spatial frameworks before the AI fills in stunning visual details. This hybrid approach gives creators unprecedented control while leveraging artificial intelligence's strengths.
The platform accepts remarkably diverse inputs:
- Text descriptions ("medieval castle courtyard")
- Photos (upload your vacation shots)
- Video clips (short environment walkthroughs)
- 3D layout diagrams (for precise structural planning)
Ready for Virtual Reality Today
Marble isn't just for desktop creators. It already works seamlessly with leading VR headsets including:
- Apple Vision Pro
- Meta Quest 3 allowing instant immersion in newly generated worlds.
The applications extend beyond entertainment too. Early adopters in robotics are using Marble to build realistic training simulations - proving this technology's potential spans multiple industries.
With flexible subscription plans now available (including a free trial), World Labs invites creators across gaming, film production, architecture and beyond to experience this new frontier in digital world-building.
Key Points:
- 🎮 Hybrid creation: Combine manual layout with AI-powered detailing
- 🖼️ Multi-input support: Generate from text, photos or videos
- 🕶️ VR-ready: Works with Apple Vision Pro and Meta Quest 3 out of the box
- 🤖 Beyond gaming: Valuable tool for robotics training simulations




