diff --git a/Client/CMakeLists.txt b/Client/CMakeLists.txt
index 4fd0458..083d58a 100644
--- a/Client/CMakeLists.txt
+++ b/Client/CMakeLists.txt
@@ -47,6 +47,14 @@ FetchContent_Declare(
 )
 FetchContent_MakeAvailable(ASSIMP)
 
+FetchContent_Declare(
+    JSONCPP
+    GIT_REPOSITORY "https://github.com/open-source-parsers/jsoncpp.git"
+    GIT_TAG "1.9.6"
+    GIT_SHALLOW ON
+)
+FetchContent_MakeAvailable(JSONCPP)
+
 file(GLOB_RECURSE Sources CONFIGURE_DEPENDS
     "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp"
 )
@@ -58,6 +66,7 @@ target_link_libraries(${PROJECT_NAME} PRIVATE glfw)
 target_link_libraries(${PROJECT_NAME} PRIVATE Microsoft.GSL::GSL)
 target_link_libraries(${PROJECT_NAME} PRIVATE spdlog)
 target_link_libraries(${PROJECT_NAME} PRIVATE assimp::assimp)
+target_link_libraries(${PROJECT_NAME} PRIVATE jsoncpp_static)
 
 if(WIN32)
     target_link_libraries(${PROJECT_NAME} PRIVATE ws2_32)
@@ -103,4 +112,18 @@ add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
     "$<TARGET_FILE_DIR:spdlog>"
     "$<TARGET_FILE_DIR:${PROJECT_NAME}>"
     COMMENT "Copying spdlog library files and symlinks to output directory"
+)
+
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+    "$<TARGET_FILE:jsoncpp_static>"
+    "$<TARGET_FILE_DIR:${PROJECT_NAME}>"
+    COMMENT "Copying jsoncpp DLL/so to output directory"
+)
+
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_directory
+    "$<TARGET_FILE_DIR:jsoncpp_static>"
+    "$<TARGET_FILE_DIR:${PROJECT_NAME}>"
+    COMMENT "Copying jsoncpp library files and symlinks to output directory"
 )
\ No newline at end of file
diff --git a/Client/src/asteroid/tick.cpp b/Client/src/asteroid/tick.cpp
index 377f16d..d3aac0d 100644
--- a/Client/src/asteroid/tick.cpp
+++ b/Client/src/asteroid/tick.cpp
@@ -53,10 +53,15 @@ void Tick(veng::Engine& engine, std::float_t delta_time) {
   if (glfwGetKey(engine.vulkan_graphics->window->GetHandle(), GLFW_KEY_W) ==
       GLFW_PRESS) {
     player->linear_acceleration = glm::normalize(forward) * 10.f;
+    player_flame->linear_velocity = player->linear_velocity;
+    player_flame->position = player->position;
+    player_flame->angular_velocity = player->angular_velocity;
+    player_flame->rotation = player->rotation;
     player_flame->visible = true;
 
     if (!w_laststate) {
       player->needsUpdate = true;
+      player_flame->needsUpdate = true;
       player->updateRedundantCount = 0;
       w_laststate = true;
     }
@@ -65,6 +70,7 @@ void Tick(veng::Engine& engine, std::float_t delta_time) {
     player_flame->visible = false;
     if (w_laststate) {
       player->needsUpdate = true;
+      player_flame->needsUpdate = true;
       player->updateRedundantCount = 0;
       w_laststate = false;
     }
diff --git a/Server/CMakeLists.txt b/Server/CMakeLists.txt
index 79e1135..60742a3 100644
--- a/Server/CMakeLists.txt
+++ b/Server/CMakeLists.txt
@@ -48,6 +48,14 @@ FetchContent_Declare(
 )
 FetchContent_MakeAvailable(ASSIMP)
 
+FetchContent_Declare(
+    JSONCPP
+    GIT_REPOSITORY "https://github.com/open-source-parsers/jsoncpp.git"
+    GIT_TAG "1.9.6"
+    GIT_SHALLOW ON
+)
+FetchContent_MakeAvailable(JSONCPP)
+
 file(GLOB_RECURSE Sources CONFIGURE_DEPENDS
     "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp"
 )
@@ -59,6 +67,7 @@ target_link_libraries(${PROJECT_NAME} PRIVATE glfw)
 target_link_libraries(${PROJECT_NAME} PRIVATE Microsoft.GSL::GSL)
 target_link_libraries(${PROJECT_NAME} PRIVATE spdlog)
 target_link_libraries(${PROJECT_NAME} PRIVATE assimp::assimp)
+target_link_libraries(${PROJECT_NAME} PRIVATE jsoncpp_static)
 
 if(WIN32)
     target_link_libraries(${PROJECT_NAME} PRIVATE ws2_32)
@@ -89,4 +98,18 @@ add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
     "$<TARGET_FILE_DIR:spdlog>"
     "$<TARGET_FILE_DIR:${PROJECT_NAME}>"
     COMMENT "Copying spdlog library files and symlinks to output directory"
+)
+
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+    "$<TARGET_FILE:jsoncpp_static>"
+    "$<TARGET_FILE_DIR:${PROJECT_NAME}>"
+    COMMENT "Copying jsoncpp DLL/so to output directory"
+)
+
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_directory
+    "$<TARGET_FILE_DIR:jsoncpp_static>"
+    "$<TARGET_FILE_DIR:${PROJECT_NAME}>"
+    COMMENT "Copying jsoncpp library files and symlinks to output directory"
 )
\ No newline at end of file
diff --git a/Server/src/server.cpp b/Server/src/server.cpp
index f2016db..c089d07 100644
--- a/Server/src/server.cpp
+++ b/Server/src/server.cpp
@@ -8,12 +8,12 @@
 #include "socket/wsa_manager.h"
 #include "utils/log.h"
 #include "utils/snowflake.h"
-#include "vulkan_engine/asset/object/model.h"
 #include "utils/utils.h"
+#include "vulkan_engine/asset/object/model.h"
 
 #define LISTENIP "::"
 #define LISTENPORT 9010
-#define TICKRATE 30
+#define TICKRATE 60
 constexpr double TICKDELAY = (1 / TICKRATE);
 
 std::uint8_t CLIENTID = 0;
@@ -24,7 +24,8 @@ std::list<std::shared_ptr<Network::Socket>> CLIENTS;
 std::mutex CLIENTS_MUTEX;
 
 void EchoClient(utils::ThreadPool* tp, Network::IOCP* iocp,
-                std::shared_ptr<Network::Socket> NewSock, Network::Address NewAddr) {
+                std::shared_ptr<Network::Socket> NewSock,
+                Network::Address NewAddr) {
   if (NewSock->sock == 0) return;
   std::future<std::list<char>> result;
   Packet::Header header;
@@ -32,7 +33,7 @@ void EchoClient(utils::ThreadPool* tp, Network::IOCP* iocp,
 
   result = iocp->recv(NewSock, 14);
   recv_data = utils::CvtListToVector(result.get());
-  
+
   header.Deserialize(recv_data);
 
   result = iocp->recv(NewSock, header.body_length);
@@ -79,6 +80,16 @@ void ClientRefresher(utils::ThreadPool* tp, Network::IOCP* iocp) {
   }
   CLIENTS_MUTEX.unlock();
 
+  for (auto it = MODELS.begin(); it != MODELS.end();) {
+    auto& model = it->second;
+
+    if (model.shouldBeDestroyed) {
+      it = MODELS.erase(it);
+      continue;
+    }
+    ++it;
+  }
+
   for (auto it = MODELS.begin(); it != MODELS.end();) {
     auto& model = it->second;
 
@@ -89,12 +100,7 @@ void ClientRefresher(utils::ThreadPool* tp, Network::IOCP* iocp) {
     }
 
     if (model.lifespan <= 0.f) {
-      it = MODELS.erase(it);
-      continue;
-    }
-
-    if (model.shouldBeDestroyed) {
-      it = MODELS.erase(it);
+      it->second.shouldBeDestroyed = true;
       continue;
     }
 
@@ -111,7 +117,13 @@ void ClientRefresher(utils::ThreadPool* tp, Network::IOCP* iocp) {
       std::vector<char> send_data;
       auto model_serialized = model.second.Serialize();
       Packet::Header header;
-      header.opcode = Packet::Opcode::UPDATEMODEL;
+
+      if (model.second.shouldBeDestroyed) {
+        header.opcode = Packet::Opcode::DESPAWNMODEL;
+      } else {
+        header.opcode = Packet::Opcode::UPDATEMODEL;
+      }
+
       header.timestamp = glfwGetTime();
       header.body_length = model_serialized.size();
       auto header_serialized = header.Serialize();
@@ -119,14 +131,16 @@ void ClientRefresher(utils::ThreadPool* tp, Network::IOCP* iocp) {
                        header_serialized.end());
       send_data.insert(send_data.end(), model_serialized.begin(),
                        model_serialized.end());
-      if (!model.second.needsUpdate && !needs_all_update) {
+      if (!model.second.needsUpdate && !needs_all_update &&
+          !model.second.shouldBeDestroyed) {
         continue;
       }
       model.second.needsUpdate = false;
       if (iocp->send(client, send_data) == -1) {
         client->sock = 0;
       }
-      spdlog::debug("server-side updated : [{}:{}]", model.second.name, model.second.ID.snowflake);
+      // spdlog::debug("server-side updated : [{}:{}]", model.second.name,
+      // model.second.ID.snowflake);
     }
   }
   CLIENTS_MUTEX.unlock();
diff --git a/impl/vulkan_engine/vulkan/engine.cpp b/impl/vulkan_engine/vulkan/engine.cpp
index 4337617..c4172a1 100644
--- a/impl/vulkan_engine/vulkan/engine.cpp
+++ b/impl/vulkan_engine/vulkan/engine.cpp
@@ -146,7 +146,7 @@ void Engine::Update() {
       vulkan_graphics->RenderModel(it.second);
     }
 
-    physics_controller_.invokeOnColisionEvent(thread_pool_, models_);
+    Physics::invokeOnColisionEvent(thread_pool_, models_);
 
     vulkan_graphics->EndFrame();
   }
@@ -240,7 +240,7 @@ void Engine::ResponseToServerAndRefresh(std::shared_ptr<Network::Socket> sock) {
       for (auto& it : models_) {
         if (it.second->ID == model->ID) {
           Interpolation(header, it.second, model);
-          spdlog::debug("model updated: [{}:{}]", model->name, model->ID.snowflake);
+          // spdlog::debug("model updated: [{}:{}]", model->name, model->ID.snowflake);
           found = true;
           break;
         }
@@ -250,8 +250,17 @@ void Engine::ResponseToServerAndRefresh(std::shared_ptr<Network::Socket> sock) {
         auto spawnedModel =
             SpawnLifedModel(model->asset_name, model->name, model->lifespan);
         std::lock_guard lock(spawnedModel->modding);
-
         spawnedModel->ID = model->ID;
+        spawnedModel->position = model->position;
+        spawnedModel->linear_velocity = model->linear_velocity;
+        spawnedModel->linear_acceleration = model->linear_acceleration;
+
+        spawnedModel->rotation = model->rotation;
+        spawnedModel->angular_velocity = model->angular_velocity;
+        spawnedModel->angular_acceleration = model->angular_acceleration;
+
+        spawnedModel->scale = model->scale;
+        spawnedModel->transform = model->transform;
 
         spawnedModel->original_offset = model->original_offset;
         spawnedModel->radius = model->radius;
@@ -260,11 +269,21 @@ void Engine::ResponseToServerAndRefresh(std::shared_ptr<Network::Socket> sock) {
         spawnedModel->visible = model->visible;
         spawnedModel->colision = model->colision;
         spawnedModel->networkReplicated = false;
-
-        Interpolation(header, spawnedModel, model);
         spdlog::info("model spawned: {}", model->ID.snowflake);
       }
     } break;
+    case Packet::Opcode::DESPAWNMODEL: {
+      std::shared_ptr<veng::Model> model = std::make_shared<veng::Model>();
+      model->Deserialize(recv_data);
+
+      for (auto it = models_.begin(); it != models_.end();) {
+        if (it->second->ID == model->ID) {
+          models_.erase(it);
+          break;
+        }
+        ++it;
+      }
+    } break;
     default:
       spdlog::error("unknown data type");
   }
diff --git a/impl/vulkan_engine/vulkan/physics.cpp b/impl/vulkan_engine/vulkan/physics.cpp
index a9bfb69..91b5863 100644
--- a/impl/vulkan_engine/vulkan/physics.cpp
+++ b/impl/vulkan_engine/vulkan/physics.cpp
@@ -12,18 +12,23 @@ void Physics::invokeOnColisionEvent(
   for (std::unordered_map<std::string, std::shared_ptr<Model>>::iterator
            iter_A = models.begin();
        iter_A != models.end(); iter_A++) {
-    auto model_A = iter_A->second;
-    if (!model_A->colision) continue;
     for (auto iter_B = std::next(iter_A); iter_B != models.end(); iter_B++) {
+      auto model_A = iter_A->second;
+      std::lock_guard<std::mutex> Alock(model_A->modding);
       auto model_B = iter_B->second;
-      if (!model_B->colision) continue;
+      std::lock_guard<std::mutex> Block(model_B->modding);
+      if (!model_A->colision || !model_B->colision) continue;
       std::float_t distance =
           glm::distance(model_A->position, model_B->position);
       std::float_t modelA_radius = model_A->radius * model_A->scale.x;
       std::float_t modelB_radius = model_B->radius * model_B->scale.x;
       if (distance <= modelA_radius + modelB_radius) {
+        model_A = iter_A->second;
+        model_B = iter_B->second;
         if (model_A->OnColision)
           thread_pool->enqueueJob(model_A->OnColision, model_A, model_B);
+        model_A = iter_A->second;
+        model_B = iter_B->second;
         if (model_B->OnColision)
           thread_pool->enqueueJob(model_B->OnColision, model_A, model_B);
       }
diff --git a/include/utils/thread_pool.h b/include/utils/thread_pool.h
index c92462e..0766490 100644
--- a/include/utils/thread_pool.h
+++ b/include/utils/thread_pool.h
@@ -51,8 +51,8 @@ class ThreadPool {
     }
 
     std::lock_guard<std::mutex> lock(jobQueueMutex);
-    auto boundFunc = [this, __job, ... __args = __args]() mutable {
-      __job(this, __args...);
+    auto boundFunc = [this, __job, ... __args = std::move(__args)]() mutable {
+      __job(this, std::move(__args)...);
     };
     auto task = std::packaged_task<void()>(std::move(boundFunc));
     jobs_.push(std::move(task));
diff --git a/include/vulkan_engine/asset/object/model.h b/include/vulkan_engine/asset/object/model.h
index 149a254..680bda2 100644
--- a/include/vulkan_engine/asset/object/model.h
+++ b/include/vulkan_engine/asset/object/model.h
@@ -166,7 +166,7 @@ struct Model {
 
   double lastUpdatedTime = 0.f;  // 서버 기준 업데이트된 시간임
 
-  std::uint8_t updateRedundantCount;
+  std::uint8_t updateRedundantCount = 0;
 
   std::mutex modding;
 
diff --git a/include/vulkan_engine/vulkan/engine.h b/include/vulkan_engine/vulkan/engine.h
index bd2d275..040ebb8 100644
--- a/include/vulkan_engine/vulkan/engine.h
+++ b/include/vulkan_engine/vulkan/engine.h
@@ -44,7 +44,6 @@ class Engine {
 
  private:
   Loader asset_loader_;
-  Physics physics_controller_;
   utils::ThreadPool* thread_pool_;
   Network::IOCP* iocp_;
 
diff --git a/include/vulkan_engine/vulkan/physics.h b/include/vulkan_engine/vulkan/physics.h
index c68d8c5..8614446 100644
--- a/include/vulkan_engine/vulkan/physics.h
+++ b/include/vulkan_engine/vulkan/physics.h
@@ -7,7 +7,7 @@
 namespace veng {
 class Physics {
  public:
-  void invokeOnColisionEvent(
+  static void invokeOnColisionEvent(
       gsl::not_null<utils::ThreadPool*> thread_pool,
       std::unordered_map<std::string, std::shared_ptr<Model>>& models);