diff --git a/runtime/bindings-generator.cs b/runtime/bindings-generator.cs
index 05549d4b1dc..914136e5509 100644
--- a/runtime/bindings-generator.cs
+++ b/runtime/bindings-generator.cs
@@ -1915,6 +1915,18 @@ static IEnumerable<FunctionData> GetFunctionData ()
 				}
 			);
 
+			data.Add (
+				new FunctionData {
+					Comment = " // Matrix4 func (/* UIInterfaceOrientation */ nint)",
+					Prefix = "simd__",
+					Variants = Variants.All,
+					ReturnType = Types.Matrix4f,
+					Parameters = new ParameterData[] {
+						new ParameterData { TypeData = Types.NInt },
+					},
+				}
+			);
+
 			// We must expand functions with native types to their actual type as well.
 			for (int i = data.Count - 1; i >= 0; i--) {
 				if (!data [i].HasNativeType)
diff --git a/src/arkit.cs b/src/arkit.cs
index f95c8ad56fa..8401b2a6085 100644
--- a/src/arkit.cs
+++ b/src/arkit.cs
@@ -163,6 +163,10 @@ Matrix4 ProjectionMatrix {
 		[Export ("projectionMatrixWithViewportSize:orientation:zNear:zFar:")]
 		[MarshalDirective (NativePrefix = "xamarin_simd__", Library = "__Internal")]
 		Matrix4 GetProjectionMatrix (CGSize viewportSize, UIInterfaceOrientation orientation, nfloat zNear, nfloat zFar);
+
+		[Export ("viewMatrixForOrientation:")]
+		[MarshalDirective (NativePrefix = "xamarin_simd__", Library = "__Internal")]
+		Matrix4 GetViewMatrix (UIInterfaceOrientation orientation);
 	}
 
 	[iOS (11,0)]
@@ -183,10 +187,10 @@ interface ARFrame : NSCopying {
 		[Export ("anchors", ArgumentSemantic.Copy)]
 		ARAnchor[] Anchors { get; }
 
-		[NullAllowed, Export ("lightEstimate", ArgumentSemantic.Copy)]
+		[NullAllowed, Export ("lightEstimate", ArgumentSemantic.Strong)]
 		ARLightEstimate LightEstimate { get; }
 
-		[NullAllowed, Export ("rawFeaturePoints")]
+		[NullAllowed, Export ("rawFeaturePoints", ArgumentSemantic.Strong)]
 		ARPointCloud RawFeaturePoints { get; }
 
 		[Export ("hitTest:types:")]
@@ -232,6 +236,9 @@ interface ARLightEstimate {
 
 		[Export ("ambientIntensity")]
 		nfloat AmbientIntensity { get; }
+
+		[Export ("ambientColorTemperature")]
+		nfloat AmbientColorTemperature { get; }
 	}
 
 	[iOS (11,0)]