diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/Import/MaterialDescriptor.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/Import/MaterialDescriptor.cs
index f91c13fdb..e5f614834 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/Import/MaterialDescriptor.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/Import/MaterialDescriptor.cs
@@ -25,13 +25,47 @@ namespace UniGLTF
         /// <summary>
         /// <code>
         /// material = new Material(matDesc.Shader);
+        /// </code>
         /// </summary>
         public readonly Shader Shader;
 
+        /// <summary>
+        /// <code>
+        /// material.renderQueue = matDesc.RenderQueue.Value;
+        /// </code>
+        /// </summary>
         public readonly int? RenderQueue;
+
         public readonly IReadOnlyDictionary<string, TextureDescriptor> TextureSlots;
+
+        /// <summary>
+        /// <code>
+        /// foreach (var kv in matDesc.FloatValues)
+        /// {
+        ///     material.SetFloat(kv.Key, kv.Value);
+        /// }        
+        /// </code>
+        /// </summary>
         public readonly IReadOnlyDictionary<string, float> FloatValues;
+
+        /// <summary>
+        /// <code>
+        /// foreach (var kv in matDesc.Colors)
+        /// {
+        ///     material.SetColor(kv.Key, kv.Value);
+        /// }
+        /// </code>
+        /// </summary>
         public readonly IReadOnlyDictionary<string, Color> Colors;
+
+        /// <summary>
+        /// <code>
+        /// foreach (var kv in matDesc.Vectors)
+        /// {
+        ///     material.SetVector(kv.Key, kv.Value);
+        /// }
+        /// </code>
+        /// </summary>
         public readonly IReadOnlyDictionary<string, Vector4> Vectors;
 
         /// <summary>
@@ -43,6 +77,10 @@ namespace UniGLTF
         /// </summary>
         public readonly IReadOnlyList<Action<Material>> Actions;
 
+        /// <summary>
+        /// New api. for new code, this is a convenience.
+        /// MaterialGenerateAsyncFunc has full access to material and can get all textures.
+        /// </summary>
         public readonly IReadOnlyList<MaterialGenerateAsyncFunc> AsyncActions;
 
         public SubAssetKey SubAssetKey => new SubAssetKey(SubAssetKey.MaterialType, Name);
@@ -68,5 +106,21 @@ namespace UniGLTF
             Actions = actions;
             AsyncActions = asyncActions ?? new List<MaterialGenerateAsyncFunc>();
         }
+
+        public MaterialDescriptor(
+            string name,
+            Shader shader,
+            IReadOnlyList<MaterialGenerateAsyncFunc> asyncActions)
+        {
+            Name = name;
+            Shader = shader;
+            RenderQueue = default;
+            TextureSlots = new Dictionary<string, TextureDescriptor>();
+            FloatValues = new Dictionary<string, float>();
+            Colors = new Dictionary<string, Color>();
+            Vectors = new Dictionary<string, Vector4>();
+            Actions = new List<Action<Material>>();
+            AsyncActions = asyncActions;
+        }
     }
 }
\ No newline at end of file
diff --git a/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/TinyMToonMaterialImporter.cs b/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/TinyMToonMaterialImporter.cs
index b5f5003e0..062c6138e 100644
--- a/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/TinyMToonMaterialImporter.cs
+++ b/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/TinyMToonMaterialImporter.cs
@@ -36,12 +36,6 @@ namespace UniVRM10.VRM10Viewer
             matDesc = new MaterialDescriptor(
                 GltfMaterialImportUtils.ImportMaterialName(i, src),
                 src.alphaMode == "BLEND" ? m_alphablend.shader : m_opaque.shader,
-                null,
-                new Dictionary<string, TextureDescriptor>(),
-                new Dictionary<string, float>(),
-                new Dictionary<string, Color>(),
-                new Dictionary<string, Vector4>(),
-                new List<Action<Material>>(),
                 new[] { (MaterialDescriptor.MaterialGenerateAsyncFunc)AsyncAction }
             );
             return true;
diff --git a/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/TinyPbrMaterialImporter.cs b/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/TinyPbrMaterialImporter.cs
index 35f137a28..0f055cf48 100644
--- a/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/TinyPbrMaterialImporter.cs
+++ b/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/TinyPbrMaterialImporter.cs
@@ -32,12 +32,6 @@ namespace UniVRM10.VRM10Viewer
             matDesc = new MaterialDescriptor(
                 GltfMaterialImportUtils.ImportMaterialName(i, src),
                 src.alphaMode == "BLEND" ? m_alphablend.shader : m_opaque.shader,
-                null,
-                new Dictionary<string, TextureDescriptor>(),
-                new Dictionary<string, float>(),
-                new Dictionary<string, Color>(),
-                new Dictionary<string, Vector4>(),
-                new List<Action<Material>>(),
                 new[] { (MaterialDescriptor.MaterialGenerateAsyncFunc)AsyncAction }
             );
             return true;