Application SpaceWarp

Application SpaceWarp is an optimization for OpenXR that helps applications maintain a high frame rate. SpaceWarp synthesizes every other frame, which can reduce computational power and energy use considerably. The technique uses reprojection when synthesizing frames to reduce latency between the user’s movements and display updates.

Refer to URP Application SpaceWarp for more details on how to use SpaceWarp.

To enable this feature in a Unity project, you need the following:

  • Unity 6000.1.13f1 or newer
  • OpenXR 1.15.1 or newer
  • Universal Render Pipeline (URP)

Refer to Enable and use Application SpaceWarp for more information on how to setup SpaceWarp in your project using OpenXR.

SpaceWarp setup

To enable SpaceWarp in your Android XR project:

  1. Open the Project Settings window in the Unity Editor (menu: Edit > Project Settings).
  2. Select the XR Plug-in Management section.
  3. Choose the tab at the top corresponding to your current XR device.
  4. Enable the OpenXR checkbox, then enable the Android XR feature group checkbox.

SpaceWarp XR Plug-in Management

  1. Underneath XR Plug-in Management, select OpenXR.
  2. In the list of OpenXR Feature Groups, select All Features.
  3. In the list of features, enable Application SpaceWarp.
  4. Click the gear icon () for Application SpaceWarp to open its configuration window.
  5. Enable Use Right Handed NDC.

SpaceWarp

Important

SpaceWarp motion vectors on Android XR devices use right-handed normalized device coordinates (NDC). You must enable the Use Right Handed NDC option on the Application SpaceWarp configuration. If this option is set incorrectly, the motion vectors will point in the wrong direction and result in erroneous warp calculations. The right-handed NDC option is only supported in Unity 6000.1.13f1+ and OpenXR 1.15.1+.