Using Scanline Racing
Scanline Racing is a feature specific to Daydream devices that when enabled helps to reduce latency in your VR project. To enable Scanline Racing in your Google VR project for Daydream devices you will need to do the following.
Open up your Project Settings and go to Platforms > Android. Under the APKPackaging section, set the following:
Minimum SDK Version: 24
Target SDK Version: 24
Under the Build section change the following:
Enabling this will add significant time to your first cook as the arm64 libraries need to be compiled.
Then under the Advanced APKPackaging section and enable the following options.
The next time you cook your Unreal Engine project and deploy it to your Daydream device, low-latency rendering will be enabled.