diff --git a/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs b/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs
index 80d9ab792c..8a088251e0 100644
--- a/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs
+++ b/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs
@@ -664,7 +664,7 @@ public class AtlasRequirementLoader : AttachmentLoader {
 				Material material = (Material)AssetDatabase.LoadAssetAtPath(materialPath, typeof(Material));
 
 				if (material == null) {
-					Shader defaultShader = Shader.Find(SpineEditorUtilities.Preferences.DefaultShader);
+					Shader defaultShader = GetDefaultShader();
 					material = defaultShader != null ? new Material(defaultShader) : null;
 					if (material) {
 						ApplyPMAOrStraightAlphaSettings(material, SpineEditorUtilities.Preferences.textureSettingsReference);
@@ -737,6 +737,13 @@ public class AtlasRequirementLoader : AttachmentLoader {
 			return loadedAtlas != null ? loadedAtlas : atlasAsset;
 		}
 
+		public static Shader GetDefaultShader () {
+			Shader shader = Shader.Find(SpineEditorUtilities.Preferences.DefaultShader);
+			if (shader == null) shader = Shader.Find("Spine/Skeleton");
+			if (shader == null) shader = Shader.Find("Standard");
+			return shader;
+		}
+
 		public static bool SpriteAtlasSettingsNeedAdjustment (UnityEngine.U2D.SpriteAtlas spriteAtlas) {
 #if EXPOSES_SPRITE_ATLAS_UTILITIES
 			UnityEditor.U2D.SpriteAtlasPackingSettings packingSettings = UnityEditor.U2D.SpriteAtlasExtensions.GetPackingSettings(spriteAtlas);
@@ -851,24 +858,24 @@ public class AtlasRequirementLoader : AttachmentLoader {
 
 			{
 				string pageName = "SpriteAtlas";
-
 				string materialPath = assetPath + "/" + primaryName + "_" + pageName + ".mat";
-				Material mat = AssetDatabase.LoadAssetAtPath<Material>(materialPath);
+				Material material = AssetDatabase.LoadAssetAtPath<Material>(materialPath);
 
-				if (mat == null) {
-					mat = new Material(Shader.Find(SpineEditorUtilities.Preferences.defaultShader));
-					ApplyPMAOrStraightAlphaSettings(mat, SpineEditorUtilities.Preferences.textureSettingsReference);
-					AssetDatabase.CreateAsset(mat, materialPath);
+				if (material == null) {
+					Shader defaultShader = GetDefaultShader();
+					material = defaultShader != null ? new Material(defaultShader) : null;
+					ApplyPMAOrStraightAlphaSettings(material, SpineEditorUtilities.Preferences.textureSettingsReference);
+					AssetDatabase.CreateAsset(material, materialPath);
 				} else {
-					vestigialMaterials.Remove(mat);
+					vestigialMaterials.Remove(material);
 				}
 
 				if (texture != null)
-					mat.mainTexture = texture;
+					material.mainTexture = texture;
 
-				EditorUtility.SetDirty(mat);
+				EditorUtility.SetDirty(material);
 				// note: don't call AssetDatabase.SaveAssets() since this would trigger OnPostprocessAllAssets() every time unnecessarily.
-				populatingMaterials.Add(mat); //atlasAsset.materials[i] = mat;
+				populatingMaterials.Add(material);
 			}
 
 			atlasAsset.materials = populatingMaterials.ToArray();
diff --git a/spine-unity/Assets/Spine/package.json b/spine-unity/Assets/Spine/package.json
index ac818cd00c..e6c56d0de5 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": "4.1.14",
+	"version": "4.1.15",
 	"unity": "2018.3",
 	"author": {
 		"name": "Esoteric Software",