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Text to 3D world generator: AI environments from a prompt

Type a description — "a foggy pine forest at dawn with a wooden footbridge" — and receive a full 360° world you can walk through in the browser and download as a Gaussian splat. Generation runs on the Marble World API; Atlas has no public API yet.

Estimated cost

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Generate 3D world from text

Sign in first. New accounts get 280 free credits, enough for one draft world.

How it works

  1. Write a prompt of up to 2,000 characters; style words such as photoreal, low-poly or anime help steer the look.
  2. Pick Draft for a quick look, Standard for a Marble 1.1 world, or HQ for Marble 1.1 Plus.
  3. The model first generates a panorama, then lifts it into a 3D Gaussian splat world.
  4. Orbit the result in the browser and download the .spz splat.

Input requirements

  • English prompts are expected to give the most consistent results.
  • Describe layout and lighting explicitly; the model fills in materials and detail.
  • Negative prompts are not supported; describe what you want instead.

Output formats

  • Gaussian splat (.spz), shown in the in-browser viewer and downloadable
  • PLY splat and GLB mesh exports: not in the tool yet

Every world opens in the in-browser viewer and downloads as .spz; .spz and .ply files also open in the free Gaussian splat viewer.

Pricing

Generation is credit-based. World Labs sells credits at $1 for 1,250 credits, a Marble 1.1 world costs 1,500 credits, about $1.20, and a draft world 150 credits, about $0.12 (as of 2026-09-13); PLY splat export is free. On this site you get 280 free credits at sign-up, enough for one draft world, then a one-time pack of 8,000 credits for $19.90, with no subscription. Full breakdown on the pricing page.

Example worlds

Sample worlds generated through the Marble World API will be added here as the gallery grows. In the meantime, browse World Labs' public Marble gallery for reference and open any exported splat in the viewer above.

Last updated 2026-09-29

Frequently asked questions

Can I use generated worlds commercially?

Commercial use depends on the upstream provider’s terms. Check World Labs’ current licence terms for Marble output before shipping anything; this site does not interpret them for you.

How long does a text-to-3D world take?

A draft world from text took about 35 seconds in our own test on September 29, 2026; Standard and HQ worlds take longer. The world page shows the status while it runs, and finished worlds stay listed in your workspace.

Is the world editable?

You can regenerate with a revised prompt or edit regions in the upstream Marble editor. This site does not offer in-browser editing.

Does it work for VR?

Download the .spz splat and load it in a WebXR-capable splat viewer. GLB mesh export for Unity or Unreal VR projects is not in the tool yet.

Is it available now?

Yes. Sign in with Google or email, and a new account gets 280 free credits once, enough for one draft world from text (230 credits). After that, a one-time pack of 8,000 credits costs $19.90.

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