diff --git a/Source/Client/Session.h b/Source/Client/Session.h
index 51779629..2470eafd 100644
--- a/Source/Client/Session.h
+++ b/Source/Client/Session.h
@@ -1,5 +1,6 @@
 #ifndef RAGNAROK_SOURCE_CLIENT_SESSION_H
 #define RAGNAROK_SOURCE_CLIENT_SESSION_H
+#include "Render/Renderer.h"
 
 #include "Contents/InstantVar.h"
 #include "Contents/Items/ItemInfo.h"
@@ -995,6 +996,7 @@ public:
   void SetUnknown7EC8(std::uint32_t value);
   void NotifyUnknown7F94Name(std::uint32_t id, const char* name);
   void sub_DE3D90(char* text);
+  void sub_DE4FF0();
   std::pair<int, int> GetShopEntry(unsigned int index, int key);
   bool HasUnknown809C(std::string name);
   void SetUnknown16EC(std::uint32_t value);
@@ -1170,4 +1172,27 @@ static_assert(offsetof(CSession, unknown_7F94) == 0x7F94);
 static_assert(offsetof(CSession, unknown_8148) == 0x8148);
 #endif
 
+
+// INLINED
+inline __declspec(noinline) void CSession::sub_DE4FF0() {
+  const float scaleX = static_cast<float>(g_renderer->viewport.width) / 1280.0f;
+  const float scaleY = static_cast<float>(g_renderer->viewport.height - 17) / 1024.0f;
+
+  for (int i = 0; i < this->m_mapPosListCount; ++i) {
+    for (std::pair<const std::string, MapPosEntry>& entry : this->m_mapPosLists[i]) {
+      entry.second.rect.left = static_cast<int>(static_cast<float>(entry.second.rect.left) * scaleX + 0.5);
+      entry.second.rect.top = static_cast<int>(static_cast<float>(entry.second.rect.top) * scaleY + 0.5) + 17;
+      entry.second.rect.right = static_cast<int>(static_cast<float>(entry.second.rect.right) * scaleX + 0.5);
+      entry.second.rect.bottom = static_cast<int>(static_cast<float>(entry.second.rect.bottom) * scaleY + 0.5) + 17;
+    }
+  }
+
+  for (std::pair<const int, MapPosEntry>& entry : this->m_mapPosBounds) {
+    entry.second.rect.left = static_cast<int>(static_cast<float>(entry.second.rect.left) * scaleX + 0.5);
+    entry.second.rect.top = static_cast<int>(static_cast<float>(entry.second.rect.top) * scaleY + 0.5) + 17;
+    entry.second.rect.right = static_cast<int>(static_cast<float>(entry.second.rect.right) * scaleX + 0.5);
+    entry.second.rect.bottom = static_cast<int>(static_cast<float>(entry.second.rect.bottom) * scaleY + 0.5) + 17;
+  }
+}
+
 #endif
diff --git a/Source/Contents/WorldView/WorldViewData.cpp b/Source/Contents/WorldView/WorldViewData.cpp
index ad7ca3e7..d057e04f 100644
--- a/Source/Contents/WorldView/WorldViewData.cpp
+++ b/Source/Contents/WorldView/WorldViewData.cpp
@@ -101,7 +101,7 @@ void CWorldViewWorld::AddField(int mapId, const char* name, CWorldViewField* fie
 
 // OFFSET: 0x006137B0
 // FUNCTION: fn_04351
-bool CWorldViewWorld::LoadTexture() {
+__declspec(noinline) bool CWorldViewWorld::LoadTexture() {
   std::string path = "유저인터페이스\\";
   path += this->imageName;
   this->texture = g_texMgr.Load(path.c_str(), 0, true, true, false);
@@ -316,6 +316,31 @@ bool CWorldViewMgr::ScaleToScreen() {
   return true;
 }
 
+// GLOBAL: gl_25167
+static int gl_25167 = 0;
+
+// OFFSET: 0x006168F0
+// FUNCTION: fn_04375
+void CWorldViewMgr::sub_6168F0() {
+  const int width = g_renderer->viewport.width;
+  if (width > 640) {
+    if (width <= 800) {
+      this->screenScale = 1;
+    } else {
+      this->screenScale = (width > 1024) + 2;
+    }
+  }
+
+  for (std::vector<CWorldViewWorld*>::iterator it = this->worlds.begin(); it != this->worlds.end(); ++it) {
+    (*it)->LoadTexture();
+  }
+
+  if (gl_25167 == 0) {
+    gl_25167 = this->ScaleToScreen();
+    g_session.sub_DE4FF0();
+  }
+}
+
 // OFFSET: 0x00616970
 // FUNCTION: fn_04376
 unsigned int CWorldViewMgr::FindWorld(int mapId) {
diff --git a/Source/Contents/WorldView/WorldViewData.h b/Source/Contents/WorldView/WorldViewData.h
index 3782dc78..df5ed5fb 100644
--- a/Source/Contents/WorldView/WorldViewData.h
+++ b/Source/Contents/WorldView/WorldViewData.h
@@ -89,6 +89,7 @@ public:
   CWorldViewMgr();
 
   bool ScaleToScreen();
+  void sub_6168F0();
   unsigned int FindWorld(int mapId);
   void ResetSelection();
   bool SelectField(const char* name);