World Labs, the spatial AI startup founded by Fei-Fei Li, is partnering with SensAI Hackademy to bring the Worlds in Action Hackathon to SIGGRAPH 2026. The event runs July 18-19 in Los Angeles, right before the conference kicks off, and every registered team gets free access to Marble Pro, World Labs' flagship 3D world generation product.
What is Marble, and why does it matter here?
World Labs launched Marble as its first commercial world model product, letting users turn text prompts, photos, videos, 3D layouts, or panoramas into editable, downloadable 3D environments. World models are AI systems that generate an internal representation of an environment, and can be used to predict future outcomes and plan actions. Think of it as the difference between a static image generator and a full spatial simulator you can walk around in.
Marble differs from competitors like Decart, Odyssey, and Google's Genie because it creates persistent, downloadable 3D environments rather than generating worlds on-the-fly as you explore. That persistence matters enormously for production use cases: you get a stable asset you can export, edit, and drop into a game engine or VFX pipeline, rather than a fleeting hallucinated scene.
Marble's subscription tiers break down as follows:
- Free: 4 generations from text, image, or panorama
- Standard ($20/month): 12 generations, multi-image/video input, advanced editing
- Pro ($35/month): 25 generations, scene expansion, commercial rights
- Max ($95/month): All features, 75 generations
The hackathon gives every team the Pro tier for free, which normally costs $35/month and includes commercial rights, making it the most useful tier for actually shipping something.
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