What Marble is
Marble is a generative world model from World Labs, the spatial-intelligence company founded by Fei-Fei Li. It creates persistent, editable, reusable 3D spaces from text, images, panoramas, video, or rough 3D layouts of boxes and planes. It ships with Chisel, an editor that lets you reshape a space with text prompts or build one from scratch.
What you can do with it
Expand a space, combine multiple spaces, restyle the visuals, and edit by prompt. When you are happy with it, you can download the result.
What it exports
Gaussian splats — the highest-fidelity option, browser-renderable via Spark on THREE.js.
Triangle meshes — including collider meshes for coarse physics and high-quality meshes for visuals.
Video — straight renders of your world.
How Marble fits into Rosebud
Marble makes the world; Rosebud makes it a game. Because splat worlds render in the browser, they slot naturally into Rosebud's browser-based, no-code workflow — generate an environment in Marble, bring it into Rosebud, and add movement, objectives, and even multiplayer with natural language. Full walkthrough: how to turn a Marble world into a playable game. For the bigger picture, see our guide to generative 3D worlds for games.
Pricing
As of 2026: a Free tier (4 outputs from text, images, or panoramas), $20/month (12 outputs, adds multi-image, video, and 3D-layout inputs), $35/month (25 outputs, world expansion, and commercial rights), and a $95/month top tier. Check World Labs for current details.
Cons and things to know
Outputs are metered per plan, so iteration has a cost; commercial rights start on the $35 tier; and a generated world is an environment, not a finished game — you still need a layer like Rosebud for the gameplay.
Frequently asked questions
Is Marble free? There is a free tier with 4 outputs; paid tiers add inputs, volume, expansion, and commercial rights.
Can I use Marble worlds commercially? Commercial rights begin on the $35/month plan.
What formats does Marble export? Gaussian splats, triangle and collider meshes, and video.
Got a Marble world? Turn it into a game in Rosebud.
Andi Bucescu
Andi is the Head of Marketing at Rosebud, where she writes about the intersection of AI, creativity, and brand storytelling. She explores how generative AI is reshaping marketing strategies and creative workflows, with a focus on making complex technology accessible and cutting through the noise of modern campaigns. Her perspective is informed by undergraduate research on effective social media content and consumer psychology.