AR Foundation Black Background with Lightweight Render Pipeline (LWRP) on Android

Hi,

I am struggling to get the LWRP template scene to render the device camera texture when AR Foundation is installed.

My Setup

Windows 10 Unity 2019.1.6f1 Google Pixel 3 with AR Core installed

Steps I've Taken

1. From Unity Hub, create a new 3D Lightweight RP project

2. In the Package Manager add AR Foundation and ARCore XR Plugin.

3. In the Build Settings, change my target to Android.

4. Add the AR Foundation basic setup (AR Session, AR Session Origin).

5. I deleted the default Main Camera and changed the tag on AR Camera to MainCamera

6. I built to device.

On device I see some of the default assets with a static camera and a black background. After a few moments AR Core has recognized enough of the scene that when I move my phone my perspective on the geometry updates accordingly. The issue is the background (where I would expect to see my camera feed) always renders black.

Note: I am able to setup a standard 3D project (not LWRP) and build to my phone while displaying the device camera texture without issue.

Any suggestions for how to fix this?

Research I've Done

• AR Foundation Documentation: Seems to indicate that The Custom Material property is optional, and typically you do not need to set it. The platform-specific packages provided by Unity (e.g., ARCore and ARKit) provide their own shaders for background rendering.

• AR Foundation LWRP Support Announcement: I was unable to find the LWRPBackgroundRendererAssetas this repo is no longer available.

• Black background issue in AR scene after adding Lightweight render pipeline effect.: The proposed solution is to use the Standard shader. This may work, but it seems to eliminate the benefits of LWRP.

Thanks in Advance!