diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContextSettings.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContextSettings.cs
index 437bb4551..f5b2f4d9e 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContextSettings.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContextSettings.cs
@@ -21,7 +21,7 @@ namespace UniGLTF
         public ImporterContextSettings(
             bool loadAnimation = true,
             Axes invertAxis = Axes.Z,
-            ImportedTexturesAccessibility importedTexturesAccessibility = ImportedTexturesAccessibility.Default)
+            ImportedTexturesAccessibility importedTexturesAccessibility = ImportedTexturesAccessibility.Auto)
         {
             LoadAnimation = loadAnimation;
             InvertAxis = invertAxis;
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/TextureIO/Import/ImportedTextureAccessibility.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/TextureIO/Import/ImportedTextureAccessibility.cs
index 267aaa64e..1c0d398ee 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/TextureIO/Import/ImportedTextureAccessibility.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/TextureIO/Import/ImportedTextureAccessibility.cs
@@ -10,18 +10,18 @@ namespace UniGLTF
     {
         /// <summary>
         /// Platform dependent.
-        /// IsEditor ? Readable : NonReadable
+        /// see: ToMarkNonReadable()
         /// </summary>
-        Default,
+        Auto,
 
         /// <summary>
         /// Bitmaps are accessible. 
-        /// Specify explicitly when exporting an imported model again
+        /// Specify explicitly when exporting an imported model again.
         /// <summary>
         Readable,
 
         /// <summary>
-        /// It can save memory usage. Recommended
+        /// It can save memory usage. Recommended.
         /// </summary>
         NonReadable,
     }
@@ -35,14 +35,14 @@ namespace UniGLTF
         {
             switch (self)
             {
-                case ImportedTexturesAccessibility.Default:
-                    if (Application.isEditor)
+                case ImportedTexturesAccessibility.Auto:
+                    if (Application.isPlaying)
                     {
                         return false;
                     }
                     else
                     {
-                        // v0.128.4 からの挙動変更
+                        // change behaviour from v0.128.4
                         return true;
                     }
 
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/TextureIO/Import/UnitySupportedImageTypeDeserializer.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/TextureIO/Import/UnitySupportedImageTypeDeserializer.cs
index 2f66d35d2..ee9c052ea 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/TextureIO/Import/UnitySupportedImageTypeDeserializer.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/TextureIO/Import/UnitySupportedImageTypeDeserializer.cs
@@ -20,7 +20,7 @@ namespace UniGLTF
         /// 
         /// v0.128.4 ImportedTexturesAccessibility を参照
         /// </remarks>
-        public ImportedTexturesAccessibility ImportedTexturesAccessibility { get; } = ImportedTexturesAccessibility.Default;
+        public ImportedTexturesAccessibility ImportedTexturesAccessibility { get; } = ImportedTexturesAccessibility.Auto;
 
         public UnitySupportedImageTypeDeserializer(ImportedTexturesAccessibility importedTexturesAccessibility)
         {