world-labs-export

| Format | Type | Best For |

| ----------------- | -------------- | ------------------------------ |

| SPZ (2M/500K) | Gaussian Splat | Native format, highest quality |

| PLY (2M/500K) | Gaussian Splat | Wide compatibility |

| Collider Mesh | GLB | Physics, collision |

| High-Quality Mesh | GLB | Rendering, modification |

| 360 Panorama | PNG | Skyboxes, previews |

1. Navigate to your generated world viewer
2. Open the Download Menu
3. Select desired format:

- Splats (SPZ) - High resolution

- Splats (low-res SPZ) - 500K, lighter compute

- Splats (PLY) - High resolution, universal compatibility

- Splats (low-res PLY) - 500K, universal

- Collider Mesh (GLB) - Instant download

- High-quality mesh (GLB) - Up to 1 hour processing

- 360 Panorama

SPZ Format (Native)

World Labs' native Gaussian splat format, optimized for file size:

| Variant | Splat Count | Use Case |

| -------- | ----------- | ------------------- |

| SPZ 2M | ~2,000,000 | Maximum quality |

| SPZ 500K | ~500,000 | Lightweight, mobile |

Advantages:

• Smallest file size
• Optimized for Marble rendering
• Fast loading in supported viewers

PLY Format (Compatible)

Standard point cloud format for broader software support:

| Variant | Splat Count | Compatibility |

| -------- | ----------- | ------------- |

| PLY 2M | ~2,000,000 | Universal |

| PLY 500K | ~500,000 | Universal |

Advantages:

• Wide software support
• Works with most third-party splat viewers
• No conversion needed for many tools

Conversion Tool:

• SPZ to PLY:

Collider Mesh (GLB)

Low-poly mesh for physics and collision:

| Property | Specification |

| -------------- | ---------------------------- |

| Triangle count | 100,000 - 200,000 |

| File size | 3-4 MB |

| UVs | None |

| Use | Collision detection, physics |

| Download | Instant |

High-Quality Mesh (GLB)

Detailed mesh for rendering—two variants available:

| Variant | Triangles | Features |

| ------------- | ---------- | --------------------- |

| Textured | ~600,000 | Texture maps included |

| Vertex Colors | ~1,000,000 | Material flexibility |

| Property | Specification |

| --------------- | ----------------------- |

| File size | 100-200 MB |

| Processing time | Up to 1 hour |

| Rate limit | 4 requests/hour |

| Availability | Only for worlds you own |

360 Panorama

| Property | Specification |

| ---------- | ----------------------------------- |

| Resolution | 2560 × 1280 |

| Format | Equirectangular PNG |

| Use | Skyboxes, VR preview, presentations |

As of December 2025, World Labs defaults to OpenGL convention:

```

-Y (down)

│

│

│

└───────→ +X (left)

╱

╱

↙

-Z (forward)

```

| Axis | Direction |

| ---- | --------------------- |

| +X | Left |

| -Y | Down |

| -Z | Forward (into screen) |

Legacy OpenCV convention (older exports):

• +X left, +Y down, +Z forward
• To convert: Scale Y and Z axes by -1

Conversion to Other Systems

To Unity (Left-handed Y-up):

```

Unity.x = WorldLabs.x

Unity.y = -WorldLabs.y

Unity.z = -WorldLabs.z

```

Scale: 1 unit = 1 meter

To Unreal (Left-handed Z-up):

```

Unreal.x = -WorldLabs.z * 100 // cm

Unreal.y = WorldLabs.x * 100

Unreal.z = -WorldLabs.y * 100

```

Scale: 1 unit = 1 centimeter

To Blender (Right-handed Z-up):

```

Blender.x = WorldLabs.x

Blender.y = -WorldLabs.z

Blender.z = -WorldLabs.y

```

Scale: 1 unit = 1 meter

Spark.js (Web) — Recommended

Three.js-based web viewer, native integration with World Labs:

• URL:
• Best for: VR experiences, interactive web games, custom applications
• Support: Active community in World Labs Discord

Unity

Plugin: aras-p UnityGaussianSplatting (Free)

| Setting | Recommendation |

| --------------- | -------------------- |

| Unity version | 6.0 (for VR) or 6.1 |

| Render pipeline | URP with HDR enabled |

| Graphics API | Vulkan (for VR) |

| File format | PLY 2M or SPZ 2M |

Notes:

• 500K SPZ files may require conversion to PLY
• For VR (Quest 3): 500K splats perform better than 2M
• Combine multiple splat components into single component for better draw-order

Unreal Engine

Multiple third-party plugins available:

| Plugin | Notes |

| ------------------------ | ------------------------------------------------------------------------------------------------ |

| Postshot | Recommended. Free version available. Requires standalone Windows app, convert SPZ to PSHT format |

| Volinga | Paid. Supports depth of field, nDisplay for virtual production |

| 3D Gaussians (Akiya) | Paid. Most reliable, automatic quality splitting, nDisplay support |

Note: Convert SPZ to PLY if plugin requires it.

Blender

Multiple third-party plugins:

| Plugin | URL | Notes |

| --------------- | ------------------- | -------------------------------------- |

| KIRI Engine | kiriengine.app | Most maintained, verified Blender 4.2+ |

| Reshot AI | github.com/ReshotAI | Better performance, straightforward |

| SplatForge | splatforge.cloud | Most performant, separate render pass |

Houdini

Plugin: GSOPs

• URL: github.com/cgnomads/GSOPs
• Compatibility: Houdini 20.5
• Features: Splat animation, VDB/mesh conversion

| Need | Recommended Format |

| ------------------- | -------------------- |

| Web viewer | SPZ 500K or PLY 500K |

| Desktop VR | PLY 500K |

| Archive/Quality | SPZ 2M or PLY 2M |

| Game engine physics | Collider Mesh GLB |

| 3D editing | HQ Mesh GLB + PLY |

| Quick preview | 360 Panorama |

| Mobile/Quest VR | PLY 500K |

| Issue | Solution |

| ------------------------- | ----------------------------------------------- |

| Assets appear upside-down | Check coordinate system; may need Y/Z axis flip |

| Wrong scale in engine | Unity uses meters, Unreal uses centimeters |

| 500K SPZ not loading | Convert to PLY using spz-to-ply.netlify.app |

| Draw-order issues | Combine multiple splats into single component |

• world-labs-api - API integration
• world-labs-studio - Compose and record before export
• world-labs-chisel - Create geometry for generation