add updateUpVectorFromRotation to children of xrCamera

src/Cameras/XR/babylon.webXRCamera.ts

@@ -28,6 +28,7 @@ module BABYLON {
                 newCamera.minZ = 0;
                 newCamera.parent = this;
                 newCamera.rotationQuaternion = new BABYLON.Quaternion();
+                newCamera.updateUpVectorFromRotation = true;
                 this.rigCameras.push(newCamera);
             }
             while (this.rigCameras.length > viewCount) {

tests/validation/config.json

@@ -2,6 +2,11 @@
   "root": "https://rawgit.com/BabylonJS/Website/master",
   "tests": [
     {
+      "title": "Camera rig",
+      "playgroundId": "#ATL1CS#9",
+      "referenceImage": "cameraRig.png"
+    },
+    {
       "title": "XR camera container rotation",
       "playgroundId": "#JV98QW#5",
       "referenceImage": "xrCameraContainerRotation.png",