diff --git a/spine-csharp/src/MathUtils.cs b/spine-csharp/src/MathUtils.cs
index 1ccc947b2..a16ca1f95 100644
--- a/spine-csharp/src/MathUtils.cs
+++ b/spine-csharp/src/MathUtils.cs
@@ -78,6 +78,10 @@ namespace Spine {
 			return sin[(int)((degrees + 90) * DegToIndex) & SIN_MASK];
 		}
 
+		static public float Atan2Deg (float y, float x) {
+			return Atan2(y, x) * RadDeg;
+		}
+
 		/// <summary>Returns atan2 in radians, faster but less accurate than Math.Atan2. Average error of 0.00231 radians (0.1323
 		/// degrees), largest error of 0.00488 radians (0.2796 degrees).</summary>
 		static public float Atan2 (float y, float x) {
diff --git a/spine-csharp/src/package.json b/spine-csharp/src/package.json
index 67160d5a1..9c0178cc2 100644
--- a/spine-csharp/src/package.json
+++ b/spine-csharp/src/package.json
@@ -2,7 +2,7 @@
 	"name": "com.esotericsoftware.spine.spine-csharp",
 	"displayName": "spine-csharp Runtime",
 	"description": "This plugin provides the spine-csharp core runtime.",
-	"version": "4.2.22",
+	"version": "4.2.23",
 	"unity": "2018.3",
 	"author": {
 		"name": "Esoteric Software",
diff --git a/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderSeparator/SkeletonRenderSeparator.cs b/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderSeparator/SkeletonRenderSeparator.cs
index 627647599..77e33cd2d 100644
--- a/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderSeparator/SkeletonRenderSeparator.cs
+++ b/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderSeparator/SkeletonRenderSeparator.cs
@@ -73,6 +73,7 @@ namespace Spine.Unity {
 		[Tooltip("Copies MeshRenderer flags into each parts renderer")]
 		public bool copyMeshRendererFlags = true;
 		public List<Spine.Unity.SkeletonPartsRenderer> partsRenderers = new List<SkeletonPartsRenderer>();
+		[System.NonSerialized] public bool isVisible = true;
 
 #if UNITY_EDITOR
 		void Reset () {
@@ -197,6 +198,10 @@ namespace Spine.Unity {
 				skeletonRenderer.LateUpdateMesh();
 		}
 
+		public void Update () {
+			UpdateVisibility();
+		}
+
 		public void OnDisable () {
 			if (skeletonRenderer == null) return;
 #if SPINE_OPTIONAL_RENDEROVERRIDE
@@ -206,6 +211,24 @@ namespace Spine.Unity {
 			ClearPartsRendererMeshes();
 		}
 
+		public void UpdateVisibility () {
+			foreach (SkeletonPartsRenderer partsRenderer in partsRenderers) {
+				if (partsRenderer == null) continue;
+
+				if (partsRenderer.MeshRenderer.isVisible) {
+					if (!isVisible) {
+						skeletonRenderer.OnBecameVisible();
+						isVisible = true;
+					}
+					return;
+				}
+			}
+			if (isVisible) {
+				isVisible = false;
+				skeletonRenderer.OnBecameInvisible();
+			}
+		}
+
 		MaterialPropertyBlock copiedBlock;
 
 		void HandleRender (SkeletonRendererInstruction instruction) {
diff --git a/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderer.cs b/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderer.cs
index 487d51883..e4a8a89c9 100644
--- a/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderer.cs
+++ b/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderer.cs
@@ -239,6 +239,7 @@ namespace Spine.Unity {
 					Initialize(false);
 					if (meshRenderer)
 						meshRenderer.enabled = false;
+					updateMode = UpdateMode.FullUpdate;
 				}
 			}
 			remove {
@@ -405,7 +406,8 @@ namespace Spine.Unity {
 
 		public virtual void Awake () {
 			Initialize(false);
-			updateMode = updateWhenInvisible;
+			if (generateMeshOverride == null || !disableRenderingOnOverride)
+				updateMode = updateWhenInvisible;
 		}
 
 #if UNITY_EDITOR && CONFIGURABLE_ENTER_PLAY_MODE
diff --git a/spine-unity/Assets/Spine/package.json b/spine-unity/Assets/Spine/package.json
index 2690ae430..87ad75740 100644
--- a/spine-unity/Assets/Spine/package.json
+++ b/spine-unity/Assets/Spine/package.json
@@ -2,7 +2,7 @@
 	"name": "com.esotericsoftware.spine.spine-unity",
 	"displayName": "spine-unity Runtime",
 	"description": "This plugin provides the spine-unity runtime core.",
-	"version": "4.2.62",
+	"version": "4.2.63",
 	"unity": "2018.3",
 	"author": {
 		"name": "Esoteric Software",