On the right track

Assets/Prefabs/OVR Scene Manager Overrides/Picture/New Render Texture.renderTexture

@@ -1,40 +0,0 @@
-%YAML 1.1
-%TAG !u! tag:unity3d.com,2011:
---- !u!84 &8400000
-RenderTexture:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_Name: New Render Texture
-  m_ImageContentsHash:
-    serializedVersion: 2
-    Hash: 00000000000000000000000000000000
-  m_ForcedFallbackFormat: 4
-  m_DownscaleFallback: 0
-  m_IsAlphaChannelOptional: 0
-  serializedVersion: 5
-  m_Width: 256
-  m_Height: 256
-  m_AntiAliasing: 1
-  m_MipCount: -1
-  m_DepthStencilFormat: 92
-  m_ColorFormat: 8
-  m_MipMap: 0
-  m_GenerateMips: 1
-  m_SRGB: 0
-  m_UseDynamicScale: 0
-  m_BindMS: 0
-  m_EnableCompatibleFormat: 1
-  m_EnableRandomWrite: 0
-  m_TextureSettings:
-    serializedVersion: 2
-    m_FilterMode: 1
-    m_Aniso: 0
-    m_MipBias: 0
-    m_WrapU: 1
-    m_WrapV: 1
-    m_WrapW: 1
-  m_Dimension: 2
-  m_VolumeDepth: 1
-  m_ShadowSamplingMode: 2

Assets/Prefabs/OVR Scene Manager Overrides/Picture/New Render Texture.renderTexture.meta

@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: 408bdb50ea5c1fb9a9ba0b304a23937f
-NativeFormatImporter:
-  externalObjects: {}
-  mainObjectFileID: 8400000
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Assets/Prefabs/OVR Scene Manager Overrides/Picture/Picture Variant.prefab

@@ -110,7 +110,13 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   outsideCameraPrefab: {fileID: 8232122274264839316, guid: ac9fbe69dff6d1c7a93e664c3f5ae6c5, type: 3}
+  window: {fileID: 6981166311419570614}
   meshRenderer: {fileID: 7611775921384905385}
+--- !u!4 &6981166311419570614 stripped
+Transform:
+  m_CorrespondingSourceObject: {fileID: 1132682185376712905, guid: 891349029806e4144812ff2d304d9cf9, type: 3}
+  m_PrefabInstance: {fileID: 8023740769919345023}
+  m_PrefabAsset: {fileID: 0}
 --- !u!23 &7611775921384905385 stripped
 MeshRenderer:
   m_CorrespondingSourceObject: {fileID: 502283750161808342, guid: 891349029806e4144812ff2d304d9cf9, type: 3}

Assets/Prefabs/OVR Scene Manager Overrides/Picture/WallArt.cs

@@ -5,6 +5,8 @@ using UnityEngine.Networking;
 public class WallArt : MonoBehaviour
 {
     public GameObject outsideCameraPrefab;
+
+    public Transform window;
     private Camera outsideCameraInstance;
     public MeshRenderer meshRenderer;
     private OVRCameraRig ovrCameraRig;
@@ -69,6 +71,9 @@ public class WallArt : MonoBehaviour
     // Update is called once per frame
     void Update()
     {
+
+        // https://www.youtube.com/watch?v=txF4t1qynyk
+
         // Check if the cameraRig is assigned
         if (ovrCameraRig == null) return;
 
@@ -77,12 +82,18 @@ public class WallArt : MonoBehaviour
         //Vector3 centerEyePosition = new Vector3();
 
         // Update the position of the object based on the CenterEyeAnchor position with an added offset to the y-axis
-        outsideCameraInstance.transform.position = new Vector3(centerEyePosition.x, centerEyePosition.y + 0f, centerEyePosition.z);
+        ///outsideCameraInstance.transform.position = new Vector3(centerEyePosition.x, centerEyePosition.y + 0f, centerEyePosition.z);
 
         // Remove rotation around the z-axis
-        Vector3 eulerRotation = ovrCameraRig.centerEyeAnchor.rotation.eulerAngles;
+        ///Vector3 eulerRotation = ovrCameraRig.centerEyeAnchor.rotation.eulerAngles;
         //Vector3 eulerRotation = Vector3.right;
-        outsideCameraInstance.transform.rotation = Quaternion.Euler(eulerRotation.x, eulerRotation.y, 0f);
+        ///outsideCameraInstance.transform.rotation = Quaternion.Euler(eulerRotation.x, eulerRotation.y, 0f);
+
+        Vector3 localPlayer = window.InverseTransformPoint(centerEyePosition);
+        outsideCameraInstance.transform.position = window.TransformPoint(new Vector3(localPlayer.x, localPlayer.y, localPlayer.z));
+        Vector3 lookAtWindow = window.TransformPoint(new Vector3(-localPlayer.x, localPlayer.y, localPlayer.z));
+        outsideCameraInstance.transform.LookAt(lookAtWindow);
+
     }
 
     private void Log(string message)

Assets/Scenes/SampleScene.unity

@@ -6486,7 +6486,7 @@ PrefabInstance:
     - target: {fileID: 747806495401477012, guid: c813208e672e3074bbe118e1a9ee94fd, type: 3}
       propertyPath: PrefabOverrides.Array.data[4].Prefab
       value: 
-      objectReference: {fileID: 3685766024578757413, guid: 00f12700905120bd8a9ac57cf4832751, type: 3}
+      objectReference: {fileID: 3685766024578757413, guid: 5af880326f63b099fa3411bbb738df9f, type: 3}
     - target: {fileID: 747806495401477012, guid: c813208e672e3074bbe118e1a9ee94fd, type: 3}
       propertyPath: PrefabOverrides.Array.data[5].Prefab
       value: 

ProjectSettings/ProjectSettings.asset

@@ -139,8 +139,6 @@ PlayerSettings:
   bundleVersion: 0.1
   preloadedAssets:
   - {fileID: 11400000, guid: 29d72bf9f28086693968cedbdc8f08cd, type: 2}
-  - {fileID: 11400000, guid: 541751c4fa90967d68ef779a22ee43f3, type: 2}
-  - {fileID: -3127938587913570544, guid: 8eb28e39ec717d0799039f01965f0533, type: 2}
   metroInputSource: 0
   wsaTransparentSwapchain: 0
   m_HolographicPauseOnTrackingLoss: 1