Resolved Secondary Camera with Oculus XR overriding frustum

I have blank project with XR (Oculus) xr rig and a secondary orthographic camera outputting to a render target. At playtime the orthographic camera's view frustum seems to be over written with the one of the xr camera.

I tried to set the camera's projectionMatrix in code from LateUpdate() and OnPreRender() but no effect.

Code (CSharp):

1. camera.projectionMatrix = Matrix4x4.Ortho(-1, 1, -1, 1, 0.001f, 1);

How can I preserve my secondary cameras view frustum?

Just to note, I am NOT using the Oculus asset package, it is just the XR plugin

 

This appears to be the same issue that I am having here.
https://forum.unity.com/threads/ui-render-texture-camera-issue-with-vr-headset.1006865/

 

I know Target Eye used to be a property on cameras, but I havent seen it in a while. I am in Unity 2019.4.13 using the URP

Is it still a thing, and if so how can I set it, since it doesnt seem to be visible in the Inspector window?

 

The Target Eye property is hidden on URP. You can tweak it by changing the inspector debug mode.
(I already filed the issue: https://fogbugz.unity3d.com/default.asp?1287123_iokev5mmpkrv2ho3)

 

That was it! Thanks Korin, and JJ!

 

Life saver, that was the issue. Oddly enough I was only having this issue when using a render texture in conjunction with at UI canvas.