diff --git a/AssetStudio/Classes/AnimationClip.cs b/AssetStudio/Classes/AnimationClip.cs
index 6bdc653..6a4f99a 100644
--- a/AssetStudio/Classes/AnimationClip.cs
+++ b/AssetStudio/Classes/AnimationClip.cs
@@ -358,16 +358,16 @@ namespace AssetStudio
 
     public class xform
     {
-        public object t;
+        public Vector3 t;
         public Quaternion q;
-        public object s;
+        public Vector3 s;
 
         public xform(ObjectReader reader)
         {
             var version = reader.version;
-            t = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? (object)reader.ReadVector3() : (object)reader.ReadVector4();//5.4 and up
+            t = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? reader.ReadVector3() : (Vector3)reader.ReadVector4();//5.4 and up
             q = reader.ReadQuaternion();
-            s = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? (object)reader.ReadVector3() : (object)reader.ReadVector4();//5.4 and up
+            s = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? reader.ReadVector3() : (Vector3)reader.ReadVector4();//5.4 and up
         }
     }
 
@@ -399,7 +399,7 @@ namespace AssetStudio
         public xform m_X;
         public float m_WeightT;
         public float m_WeightR;
-        public object m_HintT;
+        public Vector3 m_HintT;
         public float m_HintWeightT;
 
         public HumanGoal(ObjectReader reader)
@@ -410,7 +410,7 @@ namespace AssetStudio
             m_WeightR = reader.ReadSingle();
             if (version[0] >= 5)//5.0 and up
             {
-                m_HintT = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? (object)reader.ReadVector3() : (object)reader.ReadVector4();//5.4 and up
+                m_HintT = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? reader.ReadVector3() : (Vector3)reader.ReadVector4();//5.4 and up
                 m_HintWeightT = reader.ReadSingle();
             }
         }
@@ -419,19 +419,19 @@ namespace AssetStudio
     public class HumanPose
     {
         public xform m_RootX;
-        public object m_LookAtPosition;
+        public Vector3 m_LookAtPosition;
         public Vector4 m_LookAtWeight;
         public List<HumanGoal> m_GoalArray;
         public HandPose m_LeftHandPose;
         public HandPose m_RightHandPose;
         public float[] m_DoFArray;
-        public object[] m_TDoFArray;
+        public Vector3[] m_TDoFArray;
 
         public HumanPose(ObjectReader reader)
         {
             var version = reader.version;
             m_RootX = new xform(reader);
-            m_LookAtPosition = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? (object)reader.ReadVector3() : (object)reader.ReadVector4();//5.4 and up
+            m_LookAtPosition = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? reader.ReadVector3() : (Vector3)reader.ReadVector4();//5.4 and up
             m_LookAtWeight = reader.ReadVector4();
 
             int numGoals = reader.ReadInt32();
@@ -450,10 +450,10 @@ namespace AssetStudio
             if (version[0] > 5 || (version[0] == 5 && version[1] >= 2))//5.2 and up
             {
                 int numTDof = reader.ReadInt32();
-                m_TDoFArray = new object[numTDof];
+                m_TDoFArray = new Vector3[numTDof];
                 for (int i = 0; i < numTDof; i++)
                 {
-                    m_TDoFArray[i] = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? (object)reader.ReadVector3() : (object)reader.ReadVector4();//5.4 and up
+                    m_TDoFArray[i] = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? reader.ReadVector3() : (Vector3)reader.ReadVector4();//5.4 and up
                 }
             }
         }
@@ -665,7 +665,7 @@ namespace AssetStudio
         public xform m_RightFootStartX;
         public xform m_MotionStartX;
         public xform m_MotionStopX;
-        public object m_AverageSpeed;
+        public Vector3 m_AverageSpeed;
         public Clip m_Clip;
         public float m_StartTime;
         public float m_StopTime;
@@ -704,7 +704,7 @@ namespace AssetStudio
                 m_MotionStartX = new xform(reader);
                 m_MotionStopX = new xform(reader);
             }
-            m_AverageSpeed = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? (object)reader.ReadVector3() : (object)reader.ReadVector4();//5.4 and up
+            m_AverageSpeed = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? reader.ReadVector3() : (Vector3)reader.ReadVector4();//5.4 and up
             m_Clip = new Clip(reader);
             m_StartTime = reader.ReadSingle();
             m_StopTime = reader.ReadSingle();
diff --git a/AssetStudio/Classes/AnimatorController.cs b/AssetStudio/Classes/AnimatorController.cs
index 958978b..43898fd 100644
--- a/AssetStudio/Classes/AnimatorController.cs
+++ b/AssetStudio/Classes/AnimatorController.cs
@@ -448,9 +448,9 @@ namespace AssetStudio
         public bool[] m_BoolValues;
         public int[] m_IntValues;
         public float[] m_FloatValues;
-        public object[] m_PositionValues;
+        public Vector3[] m_PositionValues;
         public Vector4[] m_QuaternionValues;
-        public object[] m_ScaleValues;
+        public Vector3[] m_ScaleValues;
 
         public ValueArray(ObjectReader reader)
         {
@@ -471,19 +471,19 @@ namespace AssetStudio
             }
 
             int numPosValues = reader.ReadInt32();
-            m_PositionValues = new object[numPosValues];
+            m_PositionValues = new Vector3[numPosValues];
             for (int i = 0; i < numPosValues; i++)
             {
-                m_PositionValues[i] = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? (object)reader.ReadVector3() : (object)reader.ReadVector4(); //5.4 and up
+                m_PositionValues[i] = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? reader.ReadVector3() : (Vector3)reader.ReadVector4(); //5.4 and up
             }
 
             m_QuaternionValues = reader.ReadVector4Array(reader.ReadInt32());
 
             int numScaleValues = reader.ReadInt32();
-            m_ScaleValues = new object[numScaleValues];
+            m_ScaleValues = new Vector3[numScaleValues];
             for (int i = 0; i < numScaleValues; i++)
             {
-                m_ScaleValues[i] = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? (object)reader.ReadVector3() : (object)reader.ReadVector4(); //5.4 adn up
+                m_ScaleValues[i] = version[0] > 5 || (version[0] == 5 && version[1] >= 4) ? reader.ReadVector3() : (Vector3)reader.ReadVector4(); //5.4 adn up
             }
 
             if (version[0] > 5 || (version[0] == 5 && version[1] >= 5)) //5.5 and up
diff --git a/AssetStudio/Utility/IImported.cs b/AssetStudio/Utility/IImported.cs
index 80bd2f0..620618f 100644
--- a/AssetStudio/Utility/IImported.cs
+++ b/AssetStudio/Utility/IImported.cs
@@ -38,12 +38,13 @@ namespace AssetStudio
         public void AddChild(ImportedFrame obj)
         {
             children.Add(obj);
+            obj.Parent?.Remove(obj);
             obj.Parent = this;
         }
 
-        public void ClearChild()
+        public void Remove(ImportedFrame frame)
         {
-            children.Clear();
+            children.Remove(frame);
         }
 
         public IEnumerator<ImportedFrame> GetEnumerator()
diff --git a/AssetStudioTools/ModelConverter.cs b/AssetStudioTools/ModelConverter.cs
index 89af1a8..819729f 100644
--- a/AssetStudioTools/ModelConverter.cs
+++ b/AssetStudioTools/ModelConverter.cs
@@ -81,8 +81,7 @@ namespace AssetStudio
             var m_Transform = m_GameObject.m_Transform;
             if (!hasTransformHierarchy)
             {
-                var rootFrame = ConvertFrame(m_Transform);
-                FrameList.Add(rootFrame);
+                ConvertFrames(m_Transform, null);
                 DeoptimizeTransformHierarchy();
             }
             else
@@ -202,16 +201,18 @@ namespace AssetStudio
             var frame = new ImportedFrame();
             frame.Name = name;
             frame.InitChildren(0);
-            var m_LocalPosition = new[] { t.X, t.Y, t.Z };
-            var m_LocalRotation = new[] { q.X, q.Y, q.Z, q.W };
-            var m_LocalScale = new[] { s.X, s.Y, s.Z };
-            var m_EulerRotation = QuatToEuler(new[] { m_LocalRotation[0], -m_LocalRotation[1], -m_LocalRotation[2], m_LocalRotation[3] });
-            frame.LocalRotation = new[] { m_EulerRotation[0], m_EulerRotation[1], m_EulerRotation[2] };
-            frame.LocalScale = new[] { m_LocalScale[0], m_LocalScale[1], m_LocalScale[2] };
-            frame.LocalPosition = new[] { -m_LocalPosition[0], m_LocalPosition[1], m_LocalPosition[2] };
+            SetFrame(frame, t, q, s);
             return frame;
         }
 
+        private void SetFrame(ImportedFrame frame, Vector3 t, Quaternion q, Vector3 s)
+        {
+            var m_EulerRotation = QuatToEuler(new[] { q.X, -q.Y, -q.Z, q.W });
+            frame.LocalRotation = new[] { m_EulerRotation[0], m_EulerRotation[1], m_EulerRotation[2] };
+            frame.LocalScale = new[] { s.X, s.Y, s.Z };
+            frame.LocalPosition = new[] { -t.X, t.Y, t.Z };
+        }
+
         private void ConvertFrames(Transform trans, ImportedFrame parent)
         {
             var frame = ConvertFrame(trans);
@@ -1019,7 +1020,6 @@ namespace AssetStudio
             // 2. Restore the original transform hierarchy
             // Prerequisite: skeletonPaths follow pre-order traversal
             var rootFrame = FrameList[0];
-            rootFrame.ClearChild();
             for (var i = 1; i < skeletonPaths.Count; i++) // start from 1, skip the root transform because it will always be there.
             {
                 var path = skeletonPaths[i];
@@ -1040,18 +1040,18 @@ namespace AssetStudio
 
                 var skeletonPose = avatar.m_Avatar.m_DefaultPose;
                 var xform = skeletonPose.m_X[i];
-                if (!(xform.t is Vector3 t))
+
+                var frame = ImportedHelpers.FindChildOrRoot(transformName, rootFrame);
+                if (frame != null)
                 {
-                    var v4 = (Vector4)xform.t;
-                    t = (Vector3)v4;
+                    SetFrame(frame, xform.t, xform.q, xform.s);
+                    parentFrame.AddChild(frame);
                 }
-                if (!(xform.s is Vector3 s))
+                else
                 {
-                    var v4 = (Vector4)xform.s;
-                    s = (Vector3)v4;
+                    frame = ConvertFrame(xform.t, xform.q, xform.s, transformName);
+                    parentFrame.AddChild(frame);
                 }
-                var frame = ConvertFrame(t, xform.q, s, transformName);
-                parentFrame.AddChild(frame);
             }
         }