diff --git a/DungeonShooting_Godot/src/framework/activity/ActivityObject.cs b/DungeonShooting_Godot/src/framework/activity/ActivityObject.cs
index 128a0f6..e4b4f57 100644
--- a/DungeonShooting_Godot/src/framework/activity/ActivityObject.cs
+++ b/DungeonShooting_Godot/src/framework/activity/ActivityObject.cs
@@ -217,11 +217,11 @@
     /// </summary>
     public bool ShowOutline
     {
-        get => _blendShaderMaterial.GetShaderParameter(_shader_show_outline).AsBool();
+        get => _blendShaderMaterial == null ? false : _blendShaderMaterial.GetShaderParameter(_shader_show_outline).AsBool();
         set
         {
-            _blendShaderMaterial.SetShaderParameter(_shader_show_outline, value);
-            _shadowBlendShaderMaterial.SetShaderParameter(_shader_show_outline, value);
+            _blendShaderMaterial?.SetShaderParameter(_shader_show_outline, value);
+            _shadowBlendShaderMaterial?.SetShaderParameter(_shader_show_outline, value);
         }
     }
 
@@ -230,8 +230,8 @@
     /// </summary>
     public Color OutlineColor
     {
-        get => _blendShaderMaterial.GetShaderParameter(_shader_outline_color).AsColor();
-        set => _blendShaderMaterial.SetShaderParameter(_shader_outline_color, value);
+        get => _blendShaderMaterial == null ? Colors.Black : _blendShaderMaterial.GetShaderParameter(_shader_outline_color).AsColor();
+        set => _blendShaderMaterial?.SetShaderParameter(_shader_outline_color, value);
     }
 
     /// <summary>
@@ -239,8 +239,8 @@
     /// </summary>
     public float Grey
     {
-        get => _blendShaderMaterial.GetShaderParameter(_shader_grey).AsSingle();
-        set => _blendShaderMaterial.SetShaderParameter(_shader_grey, value);
+        get => _blendShaderMaterial == null ? 0 : _blendShaderMaterial.GetShaderParameter(_shader_grey).AsSingle();
+        set => _blendShaderMaterial?.SetShaderParameter(_shader_grey, value);
     }
 
     // --------------------------------------------------------------------------------
diff --git a/DungeonShooting_Godot/src/framework/activity/ActivityObject_EditorTool.cs b/DungeonShooting_Godot/src/framework/activity/ActivityObject_EditorTool.cs
index 69f87b8..b1a033d 100644
--- a/DungeonShooting_Godot/src/framework/activity/ActivityObject_EditorTool.cs
+++ b/DungeonShooting_Godot/src/framework/activity/ActivityObject_EditorTool.cs
@@ -29,6 +29,7 @@
                 {
                     var material =
                         ResourceManager.Load<ShaderMaterial>(ResourcePath.resource_material_Blend_tres, false);
+                    material.ResourceLocalToScene = true;
                     material.SetShaderParameter("blend", new Color(0, 0, 0, 0.47058824F));
                     material.SetShaderParameter("schedule", 1);
                     material.SetShaderParameter("modulate", new Color(1, 1, 1, 1));
@@ -43,6 +44,7 @@
                 {
                     var material =
                         ResourceManager.Load<ShaderMaterial>(ResourcePath.resource_material_Blend_tres, false);
+                    material.ResourceLocalToScene = true;
                     material.SetShaderParameter("blend", new Color(1, 1, 1, 1));
                     material.SetShaderParameter("schedule", 0);
                     material.SetShaderParameter("modulate", new Color(1, 1, 1, 1));