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The LIV SDK for Unreal Engine is a Mixed Reality (MR) toolset that enables VR developers to blend real-world video with virtual environments. It offers a complete solution for MR capture workflows with adjustable performance settings and integrates with Meta’s Presence Platform for advanced features in Unreal Engine 5.4+ through the Meta Fork.

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Key Features

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Mixed Reality Capture

  • Creates seamless real-time MR capture by blending the player’s real-world video with virtual VR environments.
  • Supports two capture workflows:
    • Background-only Capture: Isolates the background layer for compositing.
    • Full Composition: Combines real and virtual elements into a unified view.

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Customizable Capture Methods

Choose from three capture methods that balance performance, transparency
Capture MethodPerformanceTransparencyPost-ProcessingUse Case
LivCaptureSingleFastest❌✅Best for performance-critical scenarios where transparency and layering are not required.
LivCaptureGlobalClipPlaneNoPostProcessModerate✅❌Use for transparent materials when post-processing effects (ex: bloom) are not needed.
LivCaptureGlobalClipPlanePostProcessSlower✅✅Use when full transparency and post-processing effects (ex: reflections, bloom) are required.
LivCaptureBackgroundTransparency (WIP don’t use)Moderate✅ (Background)❌Captures only the background layer with transparency. The player remains excluded.
LivCaptureMulti (WIP don’t use)Moderate✅✅Use for multi-layer captures where both transparency and post-processing are needed.

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Meta Presence Platform Integration (Unreal Engine 5.4+)

When using Unreal Engine 5.4 or later, the LIV SDK connects with Meta’s Presence Platform via the Meta Fork to deliver these advanced Mixed Reality features:
  • Passthrough: Seamlessly blend the real environment with virtual content in real-time.
  • Spatial Anchors: Lock virtual objects to specific points in the real world.
  • Scene API: Harness real-world spatial data to create dynamic MR experiences.
Note: Meta Presence Platform features are only available when using the Meta Fork of Unreal Engine, or the Stock Engine + MetaXR plugin.

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Device and Platform Compatibility

Supported Unreal Engine Versions
VersionSupported Features
4.26 to 5.4MR capture for Green Screen and immersive workflows.
5.4+ (Meta Fork & Stock Engine + MetaXR plugin)Supports Meta Presence Platform (Passthrough, Anchors).
Platform Requirements
  • DirectX 11: Required for all LIV functionality.
    • Note: DirectX 12 is not supported. Use DirectX 11 via Unreal’s Project Settings.
  • Windows OS: Supported for development and deployment.
Hardware Requirements
  • VR Headsets: SteamVR-compatible devices for camera tracking (Oculus Quest, HTC Vive, Valve Index, etc)

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What’s Included in the LIV SDK?

The LIV SDK includes these essential components for Unreal Engine integration:
  1. Core Plugin Files:
    • LIV.uplugin: Unreal Engine plugin definition file.
    • Source Folder: C++ source code for MR functionality.
    • Content Folder: Essential assets (ex: shaders, configuration files). File Explorer
  2. Configuration Tools:
    • Settings for capture methods, and clipping planes. (Ignore “Transparency” option)
    • Compatibility settings for Meta Presence Platform features.
Plugin Panel