diff --git a/Assets/UniGLTF/MeshUtility/Runtime/Validation.cs b/Assets/UniGLTF/MeshUtility/Runtime/Validation.cs
index 71bb4ad5fa..82aee82aa5 100644
--- a/Assets/UniGLTF/MeshUtility/Runtime/Validation.cs
+++ b/Assets/UniGLTF/MeshUtility/Runtime/Validation.cs
@@ -46,10 +46,11 @@ public bool CanExport
 
         public readonly String Message;
 
-        Validation(ErrorLevels canExport, string message)
+        Validation(ErrorLevels canExport, string message, Action extended = null)
         {
             ErrorLevel = canExport;
             Message = message;
+            Extended = extended;
         }
 
 #if UNITY_EDITOR
@@ -76,7 +77,14 @@ public void DrawGUI()
                 default:
                     throw new NotImplementedException();
             }
+
+            if (Extended != null)
+            {
+                Extended();
+            }
         }
+
+        public Action Extended;
 #endif
 
         public static Validation Critical(string msg)
@@ -84,9 +92,9 @@ public static Validation Critical(string msg)
             return new Validation(ErrorLevels.Critical, msg);
         }
 
-        public static Validation Error(string msg)
+        public static Validation Error(string msg, Action action = null)
         {
-            return new Validation(ErrorLevels.Error, msg);
+            return new Validation(ErrorLevels.Error, msg, action);
         }
 
         public static Validation Warning(string msg)
diff --git a/Assets/VRM/Editor/FirstPerson/VRMFirstPersonEditor.cs b/Assets/VRM/Editor/FirstPerson/VRMFirstPersonEditor.cs
index 0436fc1125..53de7e2e6d 100644
--- a/Assets/VRM/Editor/FirstPerson/VRMFirstPersonEditor.cs
+++ b/Assets/VRM/Editor/FirstPerson/VRMFirstPersonEditor.cs
@@ -72,16 +72,6 @@ public override void OnInspectorGUI()
                 v.DrawGUI();
                 isValid = false;
             }
-            if (!isValid)
-            {
-                if (GUILayout.Button("reset renderers"))
-                {
-                    m_target.TraverseRenderers();
-                }
-                GUILayout.Space(10);
-                Separator();
-                GUILayout.Space(10);
-            }
 
             base.OnInspectorGUI();
         }
diff --git a/Assets/VRM/Editor/FirstPerson/VRMFirstPersonValidator.cs b/Assets/VRM/Editor/FirstPerson/VRMFirstPersonValidator.cs
index 9d5d422f32..e083c2137b 100644
--- a/Assets/VRM/Editor/FirstPerson/VRMFirstPersonValidator.cs
+++ b/Assets/VRM/Editor/FirstPerson/VRMFirstPersonValidator.cs
@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using MeshUtility;
@@ -8,24 +9,25 @@ namespace VRM
     public static class VRMFirstPersonValidator
     {
         public static Transform[] Hierarchy;
+        static Action extended;
 
         public static bool IsValid(this VRMFirstPerson.RendererFirstPersonFlags r, string name, out Validation validation)
         {
             if (r.Renderer == null)
             {
-                validation = Validation.Error($"{name}.Renderer is null");
+                validation = Validation.Error($"{name}.Renderer is null", extended);
                 return false;
             }
 
             if (!Hierarchy.Contains(r.Renderer.transform))
             {
-                validation = Validation.Error($"{name}.Renderer is out of hierarchy");
+                validation = Validation.Error($"{name}.Renderer is out of hierarchy", extended);
                 return false;
             }
 
             if (!r.Renderer.EnableForExport())
             {
-                validation = Validation.Error($"{name}.Renderer is not active");
+                validation = Validation.Error($"{name}.Renderer is not active", extended);
                 return false;
             }
 
@@ -37,6 +39,14 @@ public static IEnumerable<Validation> Validate(this VRMFirstPerson self, GameObj
         {
             Hierarchy = self.GetComponentsInChildren<Transform>(true);
 
+            extended = () =>
+            {
+                if (GUILayout.Button("reset VRMFirstPerson.Renderers"))
+                {
+                    self.TraverseRenderers();
+                }
+            };
+
             for (int i = 0; i < self.Renderers.Count; ++i)
             {
                 if (!IsValid(self.Renderers[i], $"[VRMFirstPerson]{self.name}.Renderers[{i}]", out Validation v))
diff --git a/Assets/VRM/Runtime/FirstPerson/VRMFirstPerson.cs b/Assets/VRM/Runtime/FirstPerson/VRMFirstPerson.cs
index 050e4b1911..42c9953053 100644
--- a/Assets/VRM/Runtime/FirstPerson/VRMFirstPerson.cs
+++ b/Assets/VRM/Runtime/FirstPerson/VRMFirstPerson.cs
@@ -76,7 +76,7 @@ public void SetDefault()
             }
         }
 
-        private void Reset()
+        public void Reset()
         {
             SetDefault();
             TraverseRenderers();