I've created a fullscreen post process effect that outlines objects with a specific render layer.. the only issue is it is not functional when VR is being used.
I use 'vert_img' as my vertex shader and the 'v2f_img' struct from 'UnityCG.cginc' then replaced all texture sampling functions with 'UNITY_SAMPLE_SCREENSPACE_TEXTURE' to support single pass instanced rendering so I doubt my shader is wrong.
I believe this is either a Unity bug or a serious case of bad documentation. I've provided the execute function from my render pass if anyone can offer some help or advice.
Currently using Unity 2022.3 and the latest version of URP.