Volumetric Streaming allows you to render only content inside a specific volume, improving streaming quality because the video only fills the volume. In addition, the final image rendered in client space looks stickier than the normal onAirXR stream, making it a perfect fit for mixed reality experiences.

Setting up volumetric streaming requires two steps.

Volume Setup

You must create a volume and transform it to contain your content.

1. Create a volume game object from the menu, or add AXRVolume component to a game object with mesh filter.

   

2. Transform the above volume object to contain your content objects inside.

   

   • You can change the mesh as you want, but there are a few things to consider.
     • Do not use a mesh with a lot of tris.
     • The mesh should be convex.
     • Avoid too elongated volume shapes.
   • Set your camera to AXRVolume’s Camera.
     • If none, AXRVolume finds the main camera in the scene.

Transparency by Chroma Keying

For technical reasons alpha-encoded video streaming is not yet available, so we use chroma keying technique to render transparency in the video.

• Add AXRChromaKeyCamera component to your camera.

  

  • Preset
    • Green : use green as backdrop color
    • Blue : use blue as backdrop color
    • Custom : specifies all parameters manually
  • Clear Color
    • camera’s background color
  • Key Color
    • the color to key out
  • Similarity
    • threshold between the key color and those found in the image
  • Smoothness
    • the smoothness of the color removal
  • Key Color Spill Reduction
    • how aggressively to remove traces of the key color around the edge of other colors

🏠  onAirXR Unity XR Plugin Developer Guide

Getting Started

System Requirements

Quick Start

Programming Guide

XR Plugin Settings

Input

Handle Client Events

Volumetric Streaming (BETA)

Build & Run

Build

Command Line Arguments