diff --git a/LEGO1/lego3dmanager.h b/LEGO1/lego3dmanager.h
index 0a856f90..2482218b 100644
--- a/LEGO1/lego3dmanager.h
+++ b/LEGO1/lego3dmanager.h
@@ -19,8 +19,8 @@ public:
 		IDirectDrawPalette* m_ddPalette;  // 0x14
 		BOOL m_isFullScreen;              // 0x18
 		MxU32 m_flags;                    // 0x1c
-		IDirect3D* m_direct3d;            // 0x20
-		IDirect3DDevice* m_d3dDevice;     // 0x24
+		IDirect3D2* m_direct3d;           // 0x20
+		IDirect3DDevice2* m_d3dDevice;    // 0x24
 	};
 
 	Lego3DManager();
diff --git a/LEGO1/mxdirect3d.cpp b/LEGO1/mxdirect3d.cpp
index 517a9aad..a006b4bb 100644
--- a/LEGO1/mxdirect3d.cpp
+++ b/LEGO1/mxdirect3d.cpp
@@ -111,14 +111,89 @@ BOOL MxDirect3D::CreateIDirect3D()
 	return TRUE;
 }
 
-// STUB: LEGO1 0x1009b310
+// FUNCTION: LEGO1 0x1009b310
 BOOL MxDirect3D::D3DSetMode()
 {
-	// TODO
-	// if (m_assignedDevice)
-	Error("This device cannot support the current display mode", 0);
-	OutputDebugString("MxDirect3D::D3DSetMode() front lock failed\n");
-	OutputDebugString("MxDirect3D::D3DSetMode() back lock failed\n");
+	if (m_assignedDevice->m_flags & MxAssignedDevice::Flag_HardwareMode) {
+		if (m_bOnlySoftRender) {
+			Error("Failed to place vital surfaces in video memory for hardware driver", DDERR_GENERIC);
+			return FALSE;
+		}
+
+		if (m_assignedDevice->m_desc.dpcTriCaps.dwTextureCaps & D3DPTEXTURECAPS_PERSPECTIVE)
+			m_unk0x88c = FALSE;
+		else
+			m_unk0x88c = TRUE;
+
+		DWORD bitDepth = GetZBufferBitDepth(m_assignedDevice);
+		if (!CreateZBuffer(DDSCAPS_VIDEOMEMORY, bitDepth))
+			return FALSE;
+	}
+	else {
+		if (m_assignedDevice->m_desc.dpcTriCaps.dwTextureCaps & D3DPTEXTURECAPS_PERSPECTIVE)
+			m_unk0x88c = FALSE;
+		else
+			m_unk0x88c = TRUE;
+
+		DWORD bitDepth = GetZBufferBitDepth(m_assignedDevice);
+		if (!CreateZBuffer(DDSCAPS_SYSTEMMEMORY, bitDepth))
+			return FALSE;
+	}
+
+	HRESULT result = m_pDirect3d->CreateDevice(m_assignedDevice->m_guid, m_pBackBuffer, &m_pDirect3dDevice);
+
+	if (result != DD_OK) {
+		Error("Create D3D device failed", result);
+		return FALSE;
+	}
+
+	MxDirectDraw::Mode mode = m_currentMode;
+
+	if (m_bFullScreen && !IsSupportedMode(mode.m_width, mode.m_height, mode.m_bitsPerPixel)) {
+		Error("This device cannot support the current display mode", DDERR_GENERIC);
+		return FALSE;
+	}
+
+	LPDIRECTDRAWSURFACE frontBuffer = m_pFrontBuffer;
+	LPDIRECTDRAWSURFACE backBuffer = m_pBackBuffer;
+
+	DDSURFACEDESC desc;
+	memset(&desc, 0, sizeof(desc));
+	desc.dwSize = sizeof(desc);
+
+	if (backBuffer->Lock(NULL, &desc, DDLOCK_WAIT, NULL) == DD_OK) {
+		MxU8* surface = (MxU8*) desc.lpSurface;
+
+		for (MxS32 i = mode.m_height; i > 0; i--) {
+			memset(surface, 0, mode.m_width * desc.ddpfPixelFormat.dwRGBBitCount / 8);
+			surface += desc.lPitch;
+		}
+
+		backBuffer->Unlock(desc.lpSurface);
+	}
+	else {
+		OutputDebugString("MxDirect3D::D3DSetMode() back lock failed\n");
+	}
+
+	if (m_bFullScreen) {
+		memset(&desc, 0, sizeof(desc));
+		desc.dwSize = sizeof(desc);
+
+		if (frontBuffer->Lock(NULL, &desc, DDLOCK_WAIT, NULL) == DD_OK) {
+			MxU8* surface = (MxU8*) desc.lpSurface;
+
+			for (MxS32 i = mode.m_height; i > 0; i--) {
+				memset(surface, 0, mode.m_width * desc.ddpfPixelFormat.dwRGBBitCount / 8);
+				surface += desc.lPitch;
+			}
+
+			frontBuffer->Unlock(desc.lpSurface);
+		}
+		else {
+			OutputDebugString("MxDirect3D::D3DSetMode() front lock failed\n");
+		}
+	}
+
 	return TRUE;
 }
 
diff --git a/LEGO1/mxdirect3d.h b/LEGO1/mxdirect3d.h
index 8ad41593..41cafad9 100644
--- a/LEGO1/mxdirect3d.h
+++ b/LEGO1/mxdirect3d.h
@@ -61,15 +61,15 @@ public:
 	BOOL SetDevice(MxDeviceEnumerate& p_deviceEnumerate, MxDriver* p_driver, MxDevice* p_device);
 
 	inline MxAssignedDevice* GetAssignedDevice() { return this->m_assignedDevice; };
-	inline IDirect3D* GetDirect3D() { return this->m_pDirect3d; }
-	inline IDirect3DDevice* GetDirect3DDevice() { return this->m_pDirect3dDevice; }
+	inline IDirect3D2* GetDirect3D() { return this->m_pDirect3d; }
+	inline IDirect3DDevice2* GetDirect3DDevice() { return this->m_pDirect3dDevice; }
 
 private:
-	MxAssignedDevice* m_assignedDevice; // 0x880
-	IDirect3D* m_pDirect3d;             // 0x884
-	IDirect3DDevice* m_pDirect3dDevice; // 0x888
-	undefined4 m_unk0x88c;              // 0x88c
-	undefined4 m_unk0x890;              // 0x890
+	MxAssignedDevice* m_assignedDevice;  // 0x880
+	IDirect3D2* m_pDirect3d;             // 0x884
+	IDirect3DDevice2* m_pDirect3dDevice; // 0x888
+	BOOL m_unk0x88c;                     // 0x88c
+	undefined4 m_unk0x890;               // 0x890
 };
 
 // SIZE 0x1a4
diff --git a/LEGO1/mxdirectdraw.h b/LEGO1/mxdirectdraw.h
index ce45a823..248537cd 100644
--- a/LEGO1/mxdirectdraw.h
+++ b/LEGO1/mxdirectdraw.h
@@ -68,7 +68,7 @@ protected:
 	void* m_pFatalErrorHandlerArg;              // 0x868
 	int m_pauseCount;                           // 0x86c
 	DeviceModesInfo* m_pCurrentDeviceModesList; // 0x870
-	Mode m_currentMode;                         // 0x87c
+	Mode m_currentMode;                         // 0x874
 
 public:
 	__declspec(dllexport) int FlipToGDISurface();
diff --git a/LEGO1/mxvideomanager.cpp b/LEGO1/mxvideomanager.cpp
index 3ffd8e7a..5ce00bab 100644
--- a/LEGO1/mxvideomanager.cpp
+++ b/LEGO1/mxvideomanager.cpp
@@ -120,7 +120,7 @@ void MxVideoManager::SortPresenterList()
 MxResult MxVideoManager::VTable0x28(
 	MxVideoParam& p_videoParam,
 	LPDIRECTDRAW p_pDirectDraw,
-	LPDIRECT3D p_pDirect3D,
+	LPDIRECT3D2 p_pDirect3D,
 	LPDIRECTDRAWSURFACE p_ddSurface1,
 	LPDIRECTDRAWSURFACE p_ddSurface2,
 	LPDIRECTDRAWCLIPPER p_ddClipper,
diff --git a/LEGO1/mxvideomanager.h b/LEGO1/mxvideomanager.h
index 4b458f1b..41a7ce93 100644
--- a/LEGO1/mxvideomanager.h
+++ b/LEGO1/mxvideomanager.h
@@ -21,7 +21,7 @@ public:
 	virtual MxResult VTable0x28(
 		MxVideoParam& p_videoParam,
 		LPDIRECTDRAW p_pDirectDraw,
-		LPDIRECT3D p_pDirect3D,
+		LPDIRECT3D2 p_pDirect3D,
 		LPDIRECTDRAWSURFACE p_ddSurface1,
 		LPDIRECTDRAWSURFACE p_ddSurface2,
 		LPDIRECTDRAWCLIPPER p_ddClipper,
@@ -47,7 +47,7 @@ public:
 protected:
 	MxVideoParam m_videoParam;          // 0x2c
 	LPDIRECTDRAW m_pDirectDraw;         // 0x50
-	LPDIRECT3D m_pDirect3D;             // 0x54
+	LPDIRECT3D2 m_pDirect3D;            // 0x54
 	MxDisplaySurface* m_displaySurface; // 0x58
 	MxRegion* m_region;                 // 0x5c
 	MxBool m_unk0x60;                   // 0x60
diff --git a/LEGO1/tglsurface.h b/LEGO1/tglsurface.h
index bafb2fb3..01bfad78 100644
--- a/LEGO1/tglsurface.h
+++ b/LEGO1/tglsurface.h
@@ -19,8 +19,8 @@ public:
 		IDirectDrawPalette* m_ddPalette;  // 0x14
 		BOOL m_isFullScreen;              // 0x18
 		MxU32 m_flags;                    // 0x1c
-		IDirect3D* m_direct3d;            // 0x20
-		IDirect3DDevice* m_d3dDevice;     // 0x24
+		IDirect3D2* m_direct3d;           // 0x20
+		IDirect3DDevice2* m_d3dDevice;    // 0x24
 	};
 };