--- title: "Build 3D worlds and Gaussian splats" nav_title: "3D worlds and splats" summary: - "A Gaussian splat is millions of soft, colored blobs that look like a photo with depth: great to move through, but with no polygons, UVs or collision." - "Marble builds a world from a prompt or an image: draft on 1.0, then rerun on 1.1 or 1.1 Plus. HY World turns a panorama or a walkthrough video into a splat." - "For one object, use TripoSplat or Idol. Export a world as SPZ (or PLY), and view it on the web, in VR, or in Unity and Unreal with a splat plugin." description: "Build Gaussian splat worlds from a prompt, an image, a 360 panorama or a video with Marble and HY World, make a splat of one object with TripoSplat or Idol, then export and use them." section: 3d order: 60 type: guide level: Build roles: [creator, artist, art-director, marketer, team-lead, admin, developer] time: { read: 7, do: 20, wait: 10 } needs: ["Credits for one world; a draft costs much less than a full world, and the price shows on Generate", "A prompt, an image of a place, a 360 panorama, or a walkthrough video"] last_verified: 2026-11-11 models_checked: ["Marble 1.0 Draft - World Generation", "Marble 1.1 - World Generation", "Marble 1.1 Plus - World Generation", "HY World - Skybox to Splat", "HY World - Multi-view to Splat", "TripoSplat", "Scenario Skybox GPT"] hero: 3d/3d-worlds-and-splats/ch-01-what-a-splat-is.webp video: tutorials/3d-lesson-10-worlds-and-splats.mp4 video_caption: "3D worlds and splats" thumb: 3d/thumbs/lesson-10-worlds-and-splats.webp chapters: - { at: 0, title: "What a splat is", image: "/media/images/3d/3d-worlds-and-splats/ch-01-what-a-splat-is.webp" } - { at: 40.8, title: "From a prompt", image: "/media/images/3d/3d-worlds-and-splats/ch-02-from-a-prompt.webp" } - { at: 68.42, title: "From an image", image: "/media/images/3d/3d-worlds-and-splats/ch-03-from-an-image.webp" } - { at: 96.5, title: "From a panorama or a video", image: "/media/images/3d/3d-worlds-and-splats/ch-04-from-a-panorama-or-a-video.webp" } - { at: 133.64, title: "One object", image: "/media/images/3d/3d-worlds-and-splats/ch-05-one-object.webp" } - { at: 149.88, title: "Export and use", image: "/media/images/3d/3d-worlds-and-splats/ch-06-export-and-use.webp" } related: [skyboxes-and-360, seamless-textures, export-3d-to-engines-and-dcc] pdf: true run_in: [model_worldlabs-marble-1-1, model_worldlabs-marble-1-0-draft, model_hunyuan-world-skybox-to-splat, model_hunyuan-world-multiview-to-splat, model_vast-ai-triposplat] updated: 2026-11-11 canonical: https://learn.scenario.com/3d/3d-worlds-and-splats --- Last updated: 2026-11-11 # Build 3D worlds and Gaussian splats > Build Gaussian splat worlds from a prompt, an image, a 360 panorama or a video with Marble and HY World, make a splat of one object with TripoSplat or Idol, then export and use them. In short: - A Gaussian splat is millions of soft, colored blobs that look like a photo with depth: great to move through, but with no polygons, UVs or collision. - Marble builds a world from a prompt or an image: draft on 1.0, then rerun on 1.1 or 1.1 Plus. HY World turns a panorama or a walkthrough video into a splat. - For one object, use TripoSplat or Idol. Export a world as SPZ (or PLY), and view it on the web, in VR, or in Unity and Unreal with a splat plugin. This lesson builds 3D worlds you can move through, as Gaussian splats, from a prompt, an image, a 360 panorama or a video. ## What a splat is ![Film still: What a splat is](https://ufgc0c9mhl4ueq76.public.blob.vercel-storage.com/academy/fc2c0cb6d9b15a27c3cfd056e738ca37f5d59afb8fe81ebd953b111314839f30.webp) A splat is not a mesh. It is millions of small, soft, colored blobs. Up close, you can see them. From a normal distance, they blend into something that looks like a photo, with real depth. - **Good for:** looking at and moving through a place: previs, location scouting, backgrounds and VR. - **Not for:** editing or rigging. A splat has no clean polygons, no UVs and no collision. ## From a prompt ![Film still: From a prompt](https://ufgc0c9mhl4ueq76.public.blob.vercel-storage.com/academy/711eac91f82dc0b5f6dd4d919ca3cb079c2cf84178bc4d9d7c59ea1401ed1f66.webp) Every example uses one scene: a mountain temple courtyard, made with GPT Image 2.5 Flare. **Marble**, from World Labs, builds a world from a prompt alone. The example uses the fast **1.0 Draft** tier, with **Disable Recaption** on to keep the exact words. In 44 seconds, a full world surrounds the camera. ## From an image ![Film still: From an image](https://ufgc0c9mhl4ueq76.public.blob.vercel-storage.com/academy/644f18fe8544e6de697c2c167d397d66f2491beb1dab622f281217af8897ac66.webp) With an image, draft first: same image, same seed, on **Marble 1.0 Draft**, then on **Marble 1.1**. The layout stays the same, and 1.1 is sharper. **Marble 1.1** is the balanced default: walk toward the lantern, and the temple, the pine and the steps hold their shape. For the largest, most detailed worlds, use **Marble 1.1 Plus**. ## From a panorama or a video ![Film still: From a panorama or a video](https://ufgc0c9mhl4ueq76.public.blob.vercel-storage.com/academy/0784fd7f6b60f134df7d0f7c1b0021598a3dfc184bbb8d8eba9d5198cf95d1e8.webp) - **A 360 panorama.** Make one with **Scenario Skybox GPT**, then give it to **HY World Skybox to Splat**. The three trajectory options add coverage, but also time; the example leaves them off. - **A video.** A ten second walkthrough of the courtyard went to **HY World Multi-view to Splat**. It samples the frames, and rebuilt the space in about a minute and a half. Inside the path the camera walked, the splat is solid; outside it, the world ends. So move around the place while you film, and don't just turn on the spot. ## One object ![Film still: One object](https://ufgc0c9mhl4ueq76.public.blob.vercel-storage.com/academy/e01bbbcb27b6b1723e2cec1a1b2e929f5051d76d4c48b702db88956406810aeb.webp) For a single object, use **TripoSplat** or **Sperid Labs Idol**. The stone lantern, isolated on a plain background, gave about 260,000 Gaussians with both. Idol took 14 seconds, TripoSplat under a minute. ## Export and use ![Film still: Export and use](https://ufgc0c9mhl4ueq76.public.blob.vercel-storage.com/academy/d67722719bc9b424fb4056b44fc9da595c3f84cd6344b1308a829fec79bb6862.webp) - **Export.** Download a world as an **SPZ**, a compressed splat file. HY World and the object models also give a **PLY**. The worlds here held about two million splats each. - **Use.** Splats play in a web viewer, in VR, or in Unity and Unreal with a Gaussian splat plugin. For collision, add simple shapes in the engine. - **Which one.** A prompt or an image: Marble, draft on 1.0, then 1.1 or 1.1 Plus. A panorama or a video: HY World. One object: TripoSplat or Idol. Source: https://learn.scenario.com/3d/3d-worlds-and-splats