diff --git a/application/main.cpp b/application/main.cpp
index 6437509..286ac37 100644
--- a/application/main.cpp
+++ b/application/main.cpp
@@ -10,6 +10,7 @@ int main()
     // auto sphere2               = create_primitive(primitive_data_center, PRIMITIVE_TYPE_SPHERE);
     auto cylinder              = create_primitive(primitive_data_center, PRIMITIVE_TYPE_CYLINDER);
     primitive_apply_translation(sphere1, {1.0, 0.0, 0.0});
+    // primitive_apply_scale(cylinder, {1, 1, 2});
     std::cout << "primitive created..." << std::endl;
 
     auto runtime_blobtree = create_blobtree();
diff --git a/network_process/src/prim_gen/extract_vertex_infos.cpp b/network_process/src/prim_gen/extract_vertex_infos.cpp
index ec63527..fec3ce8 100644
--- a/network_process/src/prim_gen/extract_vertex_infos.cpp
+++ b/network_process/src/prim_gen/extract_vertex_infos.cpp
@@ -39,8 +39,9 @@ void extract_vertex_infos(const s_settings&           settings,
 
     // compute the SDF values for each vertex
     for (uint32_t i = 0; i < tree.subfaces.size(); ++i) {
-        auto subface_vert_info = vertex_infos.col(i);
-        auto sdf_evaluator     = tree.subfaces[i].object_ptr->fetch_sdf_evaluator();
+        auto        subface_vert_info = vertex_infos.col(i);
+        const auto& subface           = tree.subfaces[i];
+        auto        sdf_evaluator     = subface.object_ptr->fetch_sdf_evaluator();
         for (uint32_t j = 0; j < subface_vert_info.size(); ++j) {
             auto pos             = get_vert_pos(j, scene_bg_mesh_info);
             subface_vert_info[j] = sdf_evaluator(pos);
diff --git a/primitive_process/src/primitive/simple/cylinder.cpp b/primitive_process/src/primitive/simple/cylinder.cpp
index da6c6c5..20623a6 100644
--- a/primitive_process/src/primitive/simple/cylinder.cpp
+++ b/primitive_process/src/primitive/simple/cylinder.cpp
@@ -24,7 +24,7 @@ void cylinder_t::destroy()
 void cylinder_t::initialize(primitive_data_center_t                                             &data_center,
                             const std::vector<std::pair<internal::paired_model_matrix *, bool>> &new_model_matrices)
 {
-    std::array<subface *, 3>             old_ptrs{bottom_plane.get_ptr(), cylinder_face.get_ptr(), top_plane.get_ptr()};
+    std::array<subface *, 3>             old_ptrs{cylinder_face.get_ptr(), bottom_plane.get_ptr(), top_plane.get_ptr()};
     std::array<paired_model_matrix *, 3> old_model_matrices{nullptr, nullptr, nullptr};
     for (size_t i = 0; i < 3; ++i) {
         if (old_ptrs[i] != nullptr) old_model_matrices[i] = old_ptrs[i]->model_matrices;
@@ -52,8 +52,13 @@ void cylinder_t::initialize(primitive_data_center_t
     }
 
     // deferred release to avoid acquiring the same just-released subface
-    for (size_t i = 0; i < 3; ++i) {
-        if (old_ptrs[i] != nullptr) data_center.spheres.release(old_model_matrices[i]);
+    {
+        if (old_ptrs[0] != nullptr)
+            data_center.cylinders.release(cylinder_paired_model_matrix{old_model_matrices[0]});
+        if (old_ptrs[1] != nullptr)
+            data_center.planes.release(plane_paired_model_matrix{old_model_matrices[1]});
+        if (old_ptrs[2] != nullptr)
+            data_center.planes.release(plane_paired_model_matrix{old_model_matrices[2]});
     }
 }
 } // namespace internal
\ No newline at end of file