diff --git a/Source/Render/DX7/DeviceOwnerDX7.cpp b/Source/Render/DX7/DeviceOwnerDX7.cpp
index 04717783f..a45d902a6 100644
--- a/Source/Render/DX7/DeviceOwnerDX7.cpp
+++ b/Source/Render/DX7/DeviceOwnerDX7.cpp
@@ -1,7 +1,10 @@
 #include "Render/DX7/DeviceOwnerDX7.h"
 #include "Client/Application/ApplicationWindow.h"
 #include "Render/DX7/DirectDrawEnumeration.h"
+#include "Render/DX7/RenderSystemDX7.h"
+#include "Render/DX7/TextureAllocationDX7.h"
 #include "Render/Textures/Surface.h"
+#include "UI/GameSettings/GameSettingsUI.h"
 
 #include <cstring>
 
@@ -550,15 +553,13 @@ bool DeviceOwnerDX7::SupportsTextureDimensions(std::uint32_t width, std::uint32_
 
 // OFFSET: 0x0056B890
 // FUNCTION: fn_02324
-void DeviceOwnerDX7::PrepareErrorDialog() {
-  if (this->direct3D) {
-    this->direct3D->EvictManagedTextures();
-  }
+void CRenderSystemDX7::RestoreDisplayMode() {
+  this->m_device->RestoreDisplayMode();
 }
 
-// OFFSET: 0x0056B8B0
-// FUNCTION: fn_02325
-void DeviceOwnerDX7::RestoreDisplayMode() {
+// OFFSET: 0x0054AA10
+// FUNCTION: fn_45502
+void DeviceOwnerDX7::PrepareErrorDialog() {
   if (this->draw) {
     if (this->backBuffer) {
       this->backBuffer->Unlock(nullptr);
@@ -572,18 +573,30 @@ void DeviceOwnerDX7::RestoreDisplayMode() {
   }
 }
 
+// OFFSET: 0x0056B8B0
+// FUNCTION: fn_02325
+void CRenderSystemDX7::PrepareErrorDialog() {
+  this->m_device->PrepareErrorDialog();
+}
+
 // OFFSET: 0x0056BB90
 // FUNCTION: fn_02327
 IDirect3D7* DeviceOwnerDX7::Direct3D() {
   return this->direct3D;
 }
 
-// OFFSET: 0x0056C4B0
-// FUNCTION: fn_02336
+// OFFSET: 0x0054AF00
+// FUNCTION: fn_45503
 HRESULT DeviceOwnerDX7::RestoreAllSurfaces() {
   return this->draw->RestoreAllSurfaces();
 }
 
+// OFFSET: 0x0056C4B0
+// FUNCTION: fn_02336
+HRESULT CRenderSystemDX7::TestDevice() {
+  return this->m_device->RestoreAllSurfaces();
+}
+
 // OFFSET: 0x0054A8D0
 // FUNCTION: fn_45420
 void DeviceOwnerDX7::SetDialogClipper(int enabled) {
@@ -604,3 +617,15 @@ void DeviceOwnerDX7::SetDialogClipper(int enabled) {
     clipper->Release();
   }
 }
+
+// OFFSET: 0x0054A930
+// FUNCTION: fn_45501
+void DeviceOwnerDX7::UpdateMipmapFiltering() {
+  if (g_textureFiltering != 0 && (this->caps.dpcTriCaps.dwTextureFilterCaps & D3DPTFILTERCAPS_LINEARMIPLINEAR)) {
+    g_textureAllocationDX7.descriptorFlags = DDSD_MIPMAPCOUNT;
+    g_textureAllocationDX7.surfaceCaps = DDSCAPS_COMPLEX | DDSCAPS_MIPMAP;
+  } else {
+    g_textureAllocationDX7.descriptorFlags = 0;
+    g_textureAllocationDX7.surfaceCaps = 0;
+  }
+}
diff --git a/Source/Render/DX7/DeviceOwnerDX7.h b/Source/Render/DX7/DeviceOwnerDX7.h
index fedc9d27c..87fbbbed8 100644
--- a/Source/Render/DX7/DeviceOwnerDX7.h
+++ b/Source/Render/DX7/DeviceOwnerDX7.h
@@ -28,9 +28,15 @@ public:
   bool SupportsTextureDimensions(std::uint32_t width, std::uint32_t height) const;
   void CaptureBackBuffer();
   void RestoreBackBuffer();
-  void PrepareErrorDialog();
-  void RestoreDisplayMode();
-  HRESULT RestoreAllSurfaces();
+  void UpdateMipmapFiltering();
+  __declspec(noinline) void PrepareErrorDialog();
+  // INLINED
+  void RestoreDisplayMode() {
+    if (this->direct3D) {
+      this->direct3D->EvictManagedTextures();
+    }
+  }
+  __declspec(noinline) HRESULT RestoreAllSurfaces();
   void SetDialogClipper(int enabled);
   bool CalibrateTextureCoordinates();
 
diff --git a/Source/Render/DX7/RenderSystemDX7.cpp b/Source/Render/DX7/RenderSystemDX7.cpp
index dbd743820..9da93df68 100644
--- a/Source/Render/DX7/RenderSystemDX7.cpp
+++ b/Source/Render/DX7/RenderSystemDX7.cpp
@@ -96,10 +96,7 @@ void CRenderSystemDX7::DestroySurface(CSurface* surface) {
 // OFFSET: 0x0056B880
 // FUNCTION: fn_02323
 void CRenderSystemDX7::UpdateOption() {
-  if (this->m_device) {
-    const bool trilinear = (this->m_device->caps.dpcTriCaps.dwTextureFilterCaps & D3DPTFILTERCAPS_LINEARMIPLINEAR) != 0;
-    (void)trilinear;
-  }
+  this->m_device->UpdateMipmapFiltering();
 }
 
 // OFFSET: 0x0056BBA0