World Labs Export & Integration
Export generated worlds in various formats for use in game engines, 3D software, and web applications.
Export Formats Overview
| 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 |
How to Export from Marble
- Navigate to your generated world viewer
- Open the Download Menu
- 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
Gaussian Splat Exports
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: https://spz-to-ply.netlify.app/
Mesh Exports
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 |
Image Exports
360 Panorama
| Property | Specification |
|---|---|
| Resolution | 2560 × 1280 |
| Format | Equirectangular PNG |
| Use | Skyboxes, VR preview, presentations |
Coordinate System
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.zScale: 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 * 100Scale: 1 unit = 1 centimeter
To Blender (Right-handed Z-up):
Blender.x = WorldLabs.x
Blender.y = -WorldLabs.z
Blender.z = -WorldLabs.yScale: 1 unit = 1 meter
Engine Integrations
Spark.js (Web) — Recommended
Three.js-based web viewer, native integration with World Labs:
- URL: https://sparkjs.dev/
- 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
Format Selection Guide
| 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 |
Troubleshooting
| 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 |
Related Skills
world-labs-api- API integrationworld-labs-studio- Compose and record before exportworld-labs-chisel- Create geometry for generation