diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
index 0f33eb548..ab9a3bedd 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using UniGLTF.UniUnlit;
 using UnityEngine;
 
@@ -65,7 +66,9 @@ namespace UniGLTF
         {
             Texture metallicSmoothTexture = default;
             float smoothness = 1.0f;
-            if (m.HasProperty("_MetallicGlossMap"))
+
+            var textuerNames = m.GetTexturePropertyNames();
+            if (textuerNames.Contains("_MetallicGlossMap"))
             {
                 if (m.HasProperty("_GlossMapScale"))
                 {
@@ -76,7 +79,7 @@ namespace UniGLTF
 
             Texture occlusionTexture = default;
             var occlusionStrength = 1.0f;
-            if (m.HasProperty("_OcclusionMap"))
+            if (textuerNames.Contains("_OcclusionMap"))
             {
                 occlusionTexture = m.GetTexture("_OcclusionMap");
                 if (occlusionTexture != null && m.HasProperty("_OcclusionStrength"))
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/gltfExporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/gltfExporter.cs
index 424b02de0..5aa7c151e 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/gltfExporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/gltfExporter.cs
@@ -168,6 +168,11 @@ namespace UniGLTF
             return node;
         }
 
+        public virtual void ExportExtensions()
+        {
+
+        }
+
         public virtual void Export(MeshExportSettings meshExportSettings)
         {
             var bytesBuffer = new ArrayByteBuffer(new byte[50 * 1024 * 1024]);
@@ -184,12 +189,6 @@ namespace UniGLTF
 
             var materialExporter = CreateMaterialExporter();
             glTF.materials = Materials.Select(x => materialExporter.ExportMaterial(x, TextureManager)).ToList();
-
-            for (int i = 0; i < TextureManager.Exported.Count; ++i)
-            {
-                var unityTexture = TextureManager.Exported[i];
-                glTF.PushGltfTexture(bufferIndex, unityTexture);
-            }
             #endregion
 
             #region Meshes
@@ -306,6 +305,15 @@ namespace UniGLTF
             }
             #endregion
 #endif
+
+            ExportExtensions();
+
+            // Extension で Texture が増える場合があるので最後に呼ぶ
+            for (int i = 0; i < TextureManager.Exported.Count; ++i)
+            {
+                var unityTexture = TextureManager.Exported[i];
+                glTF.PushGltfTexture(bufferIndex, unityTexture);
+            }
         }
         #endregion
     }
diff --git a/Assets/VRM/Runtime/IO/VRMExporter.cs b/Assets/VRM/Runtime/IO/VRMExporter.cs
index 1245c9196..c4d5c80bb 100644
--- a/Assets/VRM/Runtime/IO/VRMExporter.cs
+++ b/Assets/VRM/Runtime/IO/VRMExporter.cs
@@ -32,10 +32,8 @@ namespace VRM
             gltf.extensionsUsed.Add(glTF_VRM_extensions.ExtensionName);
         }
 
-        public override void Export(MeshExportSettings configuration)
+        public override void ExportExtensions()
         {
-            base.Export(configuration);
-
             // avatar
             var animator = Copy.GetComponent<Animator>();
             if (animator != null)
diff --git a/Assets/VRM/Tests/VRMLoadTests.cs b/Assets/VRM/Tests/VRMLoadTests.cs
index d671ca3ec..49173e7f3 100644
--- a/Assets/VRM/Tests/VRMLoadTests.cs
+++ b/Assets/VRM/Tests/VRMLoadTests.cs
@@ -48,17 +48,25 @@ namespace VRM
             }
         }
 
-        static void Load(FileInfo gltf, DirectoryInfo root)
+        static GameObject Load(FileInfo gltf, DirectoryInfo root, byte[] bytes = null)
         {
             var parser = new GltfParser();
             try
             {
-                parser.ParsePath(gltf.FullName);
+                if (bytes != null)
+                {
+                    parser.Parse(gltf.FullName, bytes);
+                }
+                else
+                {
+                    parser.ParsePath(gltf.FullName);
+                }
             }
             catch (Exception ex)
             {
                 Debug.LogError($"ParseError: {gltf}");
                 Debug.LogException(ex);
+                return null;
             }
 
             try
@@ -66,11 +74,13 @@ namespace VRM
                 using (var importer = new VRMImporterContext(parser))
                 {
                     importer.Load();
+                    return importer.DisposeOnGameObjectDestroyed().gameObject;
                 }
             }
             catch (Exception ex)
             {
                 Message(gltf.FullName.Substring(root.FullName.Length), ex);
+                return null;
             }
         }
 
@@ -90,7 +100,23 @@ namespace VRM
 
             foreach (var gltf in EnumerateGltfFiles(root))
             {
-                Load(gltf, root);
+                // import
+                var go = Load(gltf, root);
+                try
+                {
+                    // export
+                    var vrm = VRMExporter.Export(UniGLTF.MeshExportSettings.Default, go);
+
+                    // re import
+                    if (vrm != null)
+                    {
+                        Load(gltf, root, vrm.ToGlbBytes());
+                    }
+                }
+                finally
+                {
+                    GameObject.DestroyImmediate(go);
+                }
             }
         }
     }