Bug unity_CameraToWorld not being filled for right eye when doing single-pass stereo

Maybe I've missed the memo on something, but it seems unity_StereoCameraToWorld[1] and so by extension unity_CameraToWorld, is not being set to be accessible in the vertex shader in the two versions of Unity I've tried, 2023.1 and 2021.3 using URP.

So I'm having a great deal of trouble accessing the camera direction in my custom fx shader that uses camera direction to compute final world position.

 

Sounds more like you're not setting up the instance & eye ID via

UNITY_SETUP_INSTANCE_ID(input);

 

I thought so as well but I should have what I need according to the docs.

The end of my appdata has:

UNITY_VERTEX_INPUT_INSTANCE_ID

The end of my v2f has:

UNITY_VERTEX_OUTPUT_STEREO

and the top of my vertex shader:

Code (CSharp):

1. v2f vert (appdata v, uint vertID : SV_VertexID)
2. {
3.     v2f o;
4.     UNITY_SETUP_INSTANCE_ID(v);
5.     UNITY_INITIALIZE_OUTPUT(v2f, o);
6.     UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);