diff --git a/demo.tscn b/demo.tscn
index a89596b..858db30 100644
--- a/demo.tscn
+++ b/demo.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=9 format=3 uid="uid://btisi43jtpet"]
+[gd_scene load_steps=11 format=3 uid="uid://btisi43jtpet"]
 
 [ext_resource type="PackedScene" uid="uid://bhc6nngwjdvum" path="res://assets/test_chan/Test-Chan.fbx" id="1_lkeve"]
 [ext_resource type="Texture2D" uid="uid://drjoya1j38i21" path="res://assets/ambientcg.com/Carpet003_1K-JPG_Color.jpg" id="1_pfl7p"]
@@ -25,6 +25,16 @@ uv1_scale = Vector3(3, 3, 3)
 material = SubResource("StandardMaterial3D_603qd")
 size = Vector2(8, 8)
 
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_ahrhg"]
+albedo_color = Color(1, 1, 0, 1)
+emission = Color(1, 1, 0, 1)
+
+[sub_resource type="TorusMesh" id="TorusMesh_c2425"]
+material = SubResource("StandardMaterial3D_ahrhg")
+outer_radius = 0.6
+rings = 32
+ring_segments = 8
+
 [node name="Demo" type="Node3D"]
 
 [node name="WorldEnvironment" type="WorldEnvironment" parent="."]
@@ -40,7 +50,7 @@ transform = Transform3D(1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 0, 0,
 mesh = SubResource("QuadMesh_0334b")
 
 [node name="Camera3D" type="Camera3D" parent="."]
-transform = Transform3D(0.939693, 0.0593912, -0.336824, 0, 0.984808, 0.173648, 0.34202, -0.163176, 0.925417, -0.7, 1.4, 1.2)
+transform = Transform3D(0.939693, 0.0593911, -0.336824, 0, 0.984808, 0.173648, 0.34202, -0.163176, 0.925417, -1.7, 1.8, 3.2)
 
 [node name="Chan" type="Node3D" parent="."]
 transform = Transform3D(-1, 0, 8.74228e-08, 0, 1, 0, -8.74228e-08, 0, -1, -0.6, 0, 0)
@@ -97,13 +107,17 @@ blend_shapes/mouthPressRight = 0.0310566
 blend_shapes/mouthStretchLeft = 0.0145674
 blend_shapes/mouthStretchRight = 0.00253638
 
+[node name="GroundRing" type="MeshInstance3D" parent="Chan/XRBodyModifier3D"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.05, 0)
+mesh = SubResource("TorusMesh_c2425")
+skeleton = NodePath("")
+
 [node name="Kun" type="Node3D" parent="."]
 transform = Transform3D(-1, 0, -8.74228e-08, 0, 1, 0, 8.74228e-08, 0, -1, 0.6, 0, 0)
 
 [node name="XRBodyModifier3D" type="XRBodyModifier3D" parent="Kun"]
 body_tracker = &"/axis_studio/body"
 target = NodePath("Test-Kun/Armature/Skeleton3D")
-bone_update = 1
 show_when_tracked = false
 
 [node name="Test-Kun" parent="Kun/XRBodyModifier3D" instance=ExtResource("2_67k0v")]
@@ -152,5 +166,10 @@ blend_shapes/mouthPressRight = 0.0310566
 blend_shapes/mouthStretchLeft = 0.0145674
 blend_shapes/mouthStretchRight = 0.00253638
 
+[node name="GroundRing" type="MeshInstance3D" parent="Kun/XRBodyModifier3D"]
+transform = Transform3D(1, 0, -1.74846e-07, 0, 1, 0, 1.74846e-07, 0, 1, 0, 0.05, 0)
+mesh = SubResource("TorusMesh_c2425")
+skeleton = NodePath("")
+
 [editable path="Chan/XRBodyModifier3D/Test-Chan"]
 [editable path="Kun/XRBodyModifier3D/Test-Kun"]