diff --git a/Assets/Scenes/Main.unity b/Assets/Scenes/Main.unity
index 6bf5ea8bcf..5b0ce6989e 100644
--- a/Assets/Scenes/Main.unity
+++ b/Assets/Scenes/Main.unity
@@ -10184,7 +10184,9 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   m_SkyboxMaterial: {fileID: 2100000, guid: 502c8257ef70e3f4b9f6b176302930e6, type: 2}
-  m_DefaultEnvironment: {fileID: 11400000, guid: e7ee458a16eae2b48ac405f4ccc693e6,
+  m_DefaultEnvironment: {fileID: 11400000, guid: 5effa9d950f0f5943b60c7dd24471505,
+    type: 2}
+  m_PassthroughEnvironment: {fileID: 11400000, guid: e7ee458a16eae2b48ac405f4ccc693e6,
     type: 2}
 --- !u!114 &652605549
 MonoBehaviour:
diff --git a/Assets/Scripts/EnvironmentCatalog.cs b/Assets/Scripts/EnvironmentCatalog.cs
index 30d18a4274..ffe69c8924 100644
--- a/Assets/Scripts/EnvironmentCatalog.cs
+++ b/Assets/Scripts/EnvironmentCatalog.cs
@@ -27,6 +27,9 @@ public class EnvironmentCatalog : MonoBehaviour
         public Material m_SkyboxMaterial;
 
         [SerializeField] private TiltBrush.Environment m_DefaultEnvironment;
+
+        [SerializeField] private TiltBrush.Environment m_PassthroughEnvironment;
+
         private bool m_IsLoading;
         private Dictionary<Guid, Environment> m_GuidToEnvironment;
 
@@ -36,7 +39,15 @@ public IEnumerable<Environment> AllEnvironments
         }
         public Environment DefaultEnvironment
         {
-            get { return m_DefaultEnvironment; }
+            get
+            {
+#if ZAPBOX_SUPPORTED
+                // Load into passthrough straight away.
+                return m_PassthroughEnvironment;
+#endif
+                return m_DefaultEnvironment;
+
+            }
         }
 
         void Awake()