World Labs Export

World Labs Export & Integration

Export generated worlds in various formats for use in game engines, 3D software, and web applications.

Export Formats Overview

How to Export from Marble

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

Gaussian Splat Exports

SPZ Format (Native)

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

Advantages:

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

PLY Format (Compatible)

Standard point cloud format for broader software support:

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:

High-Quality Mesh (GLB)

Detailed mesh for rendering—two variants available:

Image Exports

360 Panorama

Coordinate System

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

       -Y (down)
        │
        │
        │
        └───────→ +X (left)
       ╱
      ╱
     ↙
    -Z (forward)

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

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)

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:

Note: Convert SPZ to PLY if plugin requires it.

Blender

Multiple third-party plugins:

Houdini

Plugin: GSOPs

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

Format Selection Guide

Troubleshooting

Related Skills

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