diff --git a/.github/actions/upload-dll/action.yml b/.github/actions/upload-dll/action.yml
index c7239ded..aed8d2e6 100644
--- a/.github/actions/upload-dll/action.yml
+++ b/.github/actions/upload-dll/action.yml
@@ -44,7 +44,7 @@ runs:
 
     - name: Upload DLL for Windows
       if: runner.os == 'Windows'
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: libplateau-windows
         path: D:\a\output
@@ -78,14 +78,14 @@ runs:
 
     - name: Upload DLL(so) for Ubuntu
       if: runner.os == 'Linux'
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: libplateau-${{matrix.os}}
         path: ${{env.HOME}}/output/
 
     - name: Upload DLL(dylib) for MacOS
       if: runner.os == 'MacOS'
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: libplateau-${{matrix.os}}-${{matrix.arch}}
         path: ${{env.HOME}}/output/
diff --git a/.github/actions/upload-mobile-dlls/action.yml b/.github/actions/upload-mobile-dlls/action.yml
index 4436b12c..e9d4b53c 100644
--- a/.github/actions/upload-mobile-dlls/action.yml
+++ b/.github/actions/upload-mobile-dlls/action.yml
@@ -93,14 +93,14 @@ runs:
 
     - name: Upload framework for Android
       if: runner.os == 'Linux'
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: libplateau-android-dll
         path: ${{github.workspace}}/out/build/x64-Release/src/libplateau.so
 
     - name: Upload framework for iOS
       if: runner.os == 'MacOS'
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: libplateau-ios-dll
 #        path: ${{github.workspace}}/out/build/x64-Release/src/Release-iphoneos/plateau.framework/*
diff --git a/.github/workflows/upload-dlls-older-visual-studio.yml b/.github/workflows/upload-dlls-older-visual-studio.yml
index 94f9c020..edbb7047 100644
--- a/.github/workflows/upload-dlls-older-visual-studio.yml
+++ b/.github/workflows/upload-dlls-older-visual-studio.yml
@@ -108,7 +108,7 @@ jobs:
           cp ~/a/libplateau-macos-14-arm64/*.a ~/a/plateau-plugins/static-libs/macos/arm64
 
       - name: upload artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: all-libraries
           path: ~/a/plateau-plugins
diff --git a/.github/workflows/upload-dlls.yml b/.github/workflows/upload-dlls.yml
index e5009c41..b0190b43 100644
--- a/.github/workflows/upload-dlls.yml
+++ b/.github/workflows/upload-dlls.yml
@@ -79,7 +79,7 @@ jobs:
 
     steps:
       - name: download-all-artifacts
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           path: ~/a
 
@@ -112,7 +112,7 @@ jobs:
           cp ~/a/libplateau-macos-14-arm64/*.a ~/a/plateau-plugins/static-libs/macos/arm64
 
       - name: upload artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: all-libraries
           path: ~/a/plateau-plugins
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index 57d9b2b4..be1ca900 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -15,6 +15,8 @@
     <mapping directory="$PROJECT_DIR$/3rdparty/openssl-cmake" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/3rdparty/xerces-c" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/3rdparty/zlib" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/out/build/x64-Mac-Release-Unreal/RapidJSON-src" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/out/build/x64-Mac-Release-Unreal/RapidJSON-src/thirdparty/gtest" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/test/gtest" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/wrappers/python/pybind11" vcs="Git" />
   </component>
diff --git a/src/polygon_mesh/sub_mesh.cpp b/src/polygon_mesh/sub_mesh.cpp
index b650898d..20ec39be 100644
--- a/src/polygon_mesh/sub_mesh.cpp
+++ b/src/polygon_mesh/sub_mesh.cpp
@@ -104,37 +104,13 @@ namespace plateau::polygonMesh {
 
     bool SubMesh::isAppearanceEqual(const plateau::polygonMesh::SubMesh& other) const {
 
-        // 留意: ここを編集するときは、SubMeshCompareByAppearance::operator() も対応するように編集してください。
-        if(getGameMaterialID() != other.getGameMaterialID()) return false;
-
-        // ゲームマテリアルIDがセットされているなら、他のすべてに優先してこれだけで比較します。
-        if(getGameMaterialID() >= 0){
-            return true;
-        }
-
-
-        if(getTexturePath() != other.getTexturePath()) return false;
-        const auto mat_s = getMaterial();
-        const auto mat_o = other.getMaterial();
-        if(mat_s.get() == mat_o.get()) return true;
-        if(!mat_s && mat_o) return false;
-        if(mat_s && !mat_o) return false;
-        if(mat_s->getDiffuse() != mat_o->getDiffuse()) return false;
-        if(mat_s->getEmissive() != mat_o->getEmissive()) return false;
-        if(mat_s->getSpecular() != mat_o->getSpecular()) return false;
-        if(mat_s->getAmbientIntensity() != mat_o->getAmbientIntensity()) return false;
-        if(mat_s->getShininess() != mat_o->getShininess()) return false;
-        if(mat_s->getTransparency() != mat_o->getTransparency()) return false;
-        if(mat_s->isSmooth() != mat_o->isSmooth()) return false;
-        return true;
+        SubMeshCompareByAppearance comp;
+        return comp(*this, other) == false && comp(other, *this) == false;
     }
 
     bool SubMeshCompareByAppearance::operator()(const plateau::polygonMesh::SubMesh& lhs,
                                                 const plateau::polygonMesh::SubMesh& rhs) const {
 
-        // 留意: ここを編集するときは、SubMesh::isAppearanceEqual も対応するように編集してください。
-        //      lhsがrhsよりも小さい場合にtrueを返します。等しい場合はfalseです。
-
         // gameMaterialの比較
         if(lhs.getGameMaterialID() != rhs.getGameMaterialID()) return lhs.getGameMaterialID() < rhs.getGameMaterialID();