diff --git a/Assets/VRM.Samples/Scripts/ViewerUI.cs b/Assets/VRM.Samples/Scripts/ViewerUI.cs
index a754a720b..5a1b21c06 100644
--- a/Assets/VRM.Samples/Scripts/ViewerUI.cs
+++ b/Assets/VRM.Samples/Scripts/ViewerUI.cs
@@ -167,6 +167,7 @@ namespace VRM.Samples
         }
 
         HumanPoseTransfer m_loaded;
+        VRMBlendShapeProxy m_proxy;
 
         AIUEO m_lipSync;
         bool m_enableLipSyncValue;
@@ -235,6 +236,11 @@ namespace VRM.Samples
             }
 
             m_ui.UpdateToggle(EnableBvh, EnableTPose);
+
+            if (m_proxy != null)
+            {
+                m_proxy.Apply();
+            }
         }
 
         void EnableBvh()
@@ -361,6 +367,8 @@ namespace VRM.Samples
                 {
                     animation.Play(animation.clip.name);
                 }
+
+                m_proxy = go.GetComponent<VRMBlendShapeProxy>();
             }
         }
 
diff --git a/Assets/VRM/UniVRM/Scripts/LookAt/VRMLookAtBlendShapeApplyer.cs b/Assets/VRM/UniVRM/Scripts/LookAt/VRMLookAtBlendShapeApplyer.cs
index a859e532a..252fd9350 100644
--- a/Assets/VRM/UniVRM/Scripts/LookAt/VRMLookAtBlendShapeApplyer.cs
+++ b/Assets/VRM/UniVRM/Scripts/LookAt/VRMLookAtBlendShapeApplyer.cs
@@ -17,8 +17,21 @@ namespace VRM
         [SerializeField]
         public CurveMapper VerticalUp = new CurveMapper(90.0f, 1.0f);
 
+        /// <summary>
+        /// v0.56 からデフォルト値を true に変更
+        /// 
+        /// true の場合: BlendShapeProxy.AccumulateValue を使う(推奨)
+        ///     別途 BlendShapeProxy.Apply を別の場所で呼び出す必要があります
+        /// false の場合: BlendShapeProxy.ImmediatelySetValueを使う
+        ///     目をテクスチャUVのOffset値の変更で表現するモデルの場合に、
+        ///     Material.SetVector("_MainTex_ST", new Vector4(1, 1, 横の移動値, 0))
+        ///     Material.SetVector("_MainTex_ST", new Vector4(1, 1, 0, 縦の移動値))
+        ///     と連続で呼ばれることで、横の移動値が打ち消されてしまいます。
+        ///     BlendShapeProxy.AccumulateValue はこの値を加算して new Vector4(1, 1, 横の移動値, 縦の移動値) 
+        ///     となるように扱えます。
+        /// </summary>
         [SerializeField]
-        public bool m_notSetValueApply;
+        public bool m_notSetValueApply = true;
 
         public void OnImported(VRMImporterContext context)
         {