diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 68ef687b..970232db 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -59,7 +59,8 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y \
-            libx11-dev libxext-dev libxrandr-dev libxrender-dev libxfixes-dev libxi-dev libxinerama-dev libxcursor-dev libwayland-dev libxkbcommon-dev wayland-protocols
+            libx11-dev libxext-dev libxrandr-dev libxrender-dev libxfixes-dev libxi-dev libxinerama-dev \
+            libxcursor-dev libwayland-dev libxkbcommon-dev wayland-protocols
 
       - name: Install macOS dependencies (brew)
         if: ${{ matrix.brew }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9dbaab25..8edd07da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -144,6 +144,7 @@ target_include_directories(Vec::Vec INTERFACE "${CMAKE_SOURCE_DIR}/3rdparty/vec"
 add_library(lego1 SHARED
   LEGO1/main.cpp
 )
+target_precompile_headers(lego1 PRIVATE "LEGO1/lego1_pch.h")
 set_property(TARGET lego1 PROPERTY DEFINE_SYMBOL "LEGO1_DLL")
 target_include_directories(lego1 PUBLIC "$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/util>")
 target_include_directories(lego1 PUBLIC "$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/LEGO1>")
diff --git a/LEGO1/lego/legoomni/src/worlds/registrationbook.cpp b/LEGO1/lego/legoomni/src/worlds/registrationbook.cpp
index c0e6d1ed..8f152f91 100644
--- a/LEGO1/lego/legoomni/src/worlds/registrationbook.cpp
+++ b/LEGO1/lego/legoomni/src/worlds/registrationbook.cpp
@@ -223,11 +223,15 @@ MxLong RegistrationBook::HandleKeyPress(SDL_Keycode p_key)
 // FUNCTION: LEGO1 0x100774a0
 MxLong RegistrationBook::HandleControl(LegoControlManagerNotificationParam& p_param)
 {
-	MxS16 unk0x28 = p_param.m_unk0x28;
+	MxS16 buttonId = p_param.m_unk0x28;
 
-	if (unk0x28 >= 1 && unk0x28 <= 28) {
+	if (buttonId >= 1 && buttonId <= 28) {
 		if (p_param.m_clickedObjectId == RegbookScript::c_Alphabet_Ctl) {
-			if (unk0x28 == 28) {
+			// buttonId:
+			// - [1, 26]: alphabet
+			// - 27: backspace
+			// - 28: go back to information center
+			if (buttonId == 28) {
 				DeleteObjects(&m_atomId, RegbookScript::c_iic006in_RunAnim, RegbookScript::c_iic008in_PlayWav);
 
 				if (GameState()->GetCurrentAct() == LegoGameState::e_act1) {
@@ -240,14 +244,15 @@ MxLong RegistrationBook::HandleControl(LegoControlManagerNotificationParam& p_pa
 				TransitionManager()->StartTransition(MxTransitionManager::e_mosaic, 50, FALSE, FALSE);
 			}
 			else {
-				if (unk0x28 > 28) {
+				if (buttonId > 28) {
 					return 1;
 				}
 
-				HandleKeyPress(unk0x28 < 27 ? unk0x28 + 64 : 8);
+				HandleKeyPress(buttonId < 27 ? SDLK_A + buttonId - 1 : SDLK_BACKSPACE);
 			}
 		}
 		else {
+			// Select another profile (buttonId is always 1)
 			InputManager()->DisableInputProcessing();
 			DeleteObjects(&m_atomId, RegbookScript::c_iic006in_RunAnim, RegbookScript::c_iic008in_PlayWav);
 
diff --git a/LEGO1/lego1_pch.h b/LEGO1/lego1_pch.h
new file mode 100644
index 00000000..e9c429a6
--- /dev/null
+++ b/LEGO1/lego1_pch.h
@@ -0,0 +1,309 @@
+#ifndef LEGO1_PCH_H
+#define LEGO1_PCH_H
+
+#include "define.h"
+#include "lego/legoomni/include/act2actor.h"
+#include "lego/legoomni/include/act2brick.h"
+#include "lego/legoomni/include/act2genactor.h"
+#include "lego/legoomni/include/act2policestation.h"
+#include "lego/legoomni/include/act3.h"
+#include "lego/legoomni/include/act3actors.h"
+#include "lego/legoomni/include/act3ammo.h"
+#include "lego/legoomni/include/actions/act2main_actions.h"
+#include "lego/legoomni/include/actions/act3_actions.h"
+#include "lego/legoomni/include/actions/actionsfwd.h"
+#include "lego/legoomni/include/actions/carrace_actions.h"
+#include "lego/legoomni/include/actions/carracer_actions.h"
+#include "lego/legoomni/include/actions/copter_actions.h"
+#include "lego/legoomni/include/actions/credits_actions.h"
+#include "lego/legoomni/include/actions/dunecar_actions.h"
+#include "lego/legoomni/include/actions/elevbott_actions.h"
+#include "lego/legoomni/include/actions/garage_actions.h"
+#include "lego/legoomni/include/actions/histbook_actions.h"
+#include "lego/legoomni/include/actions/hospital_actions.h"
+#include "lego/legoomni/include/actions/infodoor_actions.h"
+#include "lego/legoomni/include/actions/infomain_actions.h"
+#include "lego/legoomni/include/actions/infoscor_actions.h"
+#include "lego/legoomni/include/actions/intro_actions.h"
+#include "lego/legoomni/include/actions/isle_actions.h"
+#include "lego/legoomni/include/actions/jetrace_actions.h"
+#include "lego/legoomni/include/actions/jetracer_actions.h"
+#include "lego/legoomni/include/actions/jetski_actions.h"
+#include "lego/legoomni/include/actions/jukebox_actions.h"
+#include "lego/legoomni/include/actions/jukeboxw_actions.h"
+#include "lego/legoomni/include/actions/nocd_actions.h"
+#include "lego/legoomni/include/actions/police_actions.h"
+#include "lego/legoomni/include/actions/racecar_actions.h"
+#include "lego/legoomni/include/actions/regbook_actions.h"
+#include "lego/legoomni/include/actions/sndanim_actions.h"
+#include "lego/legoomni/include/ambulance.h"
+#include "lego/legoomni/include/bike.h"
+#include "lego/legoomni/include/buildingentity.h"
+#include "lego/legoomni/include/buildings.h"
+#include "lego/legoomni/include/bumpbouy.h"
+#include "lego/legoomni/include/carrace.h"
+#include "lego/legoomni/include/doors.h"
+#include "lego/legoomni/include/dunebuggy.h"
+#include "lego/legoomni/include/elevatorbottom.h"
+#include "lego/legoomni/include/extra.h"
+#include "lego/legoomni/include/gasstation.h"
+#include "lego/legoomni/include/helicopter.h"
+#include "lego/legoomni/include/historybook.h"
+#include "lego/legoomni/include/hospital.h"
+#include "lego/legoomni/include/infocenter.h"
+#include "lego/legoomni/include/infocenterdoor.h"
+#include "lego/legoomni/include/isle.h"
+#include "lego/legoomni/include/isleactor.h"
+#include "lego/legoomni/include/islepathactor.h"
+#include "lego/legoomni/include/jetski.h"
+#include "lego/legoomni/include/jetskirace.h"
+#include "lego/legoomni/include/jukebox.h"
+#include "lego/legoomni/include/jukeboxentity.h"
+#include "lego/legoomni/include/lego3dsound.h"
+#include "lego/legoomni/include/lego3dwavepresenter.h"
+#include "lego/legoomni/include/legoact2.h"
+#include "lego/legoomni/include/legoactioncontrolpresenter.h"
+#include "lego/legoomni/include/legoactor.h"
+#include "lego/legoomni/include/legoactorpresenter.h"
+#include "lego/legoomni/include/legoactors.h"
+#include "lego/legoomni/include/legoanimactor.h"
+#include "lego/legoomni/include/legoanimationmanager.h"
+#include "lego/legoomni/include/legoanimmmpresenter.h"
+#include "lego/legoomni/include/legoanimpresenter.h"
+#include "lego/legoomni/include/legobuildingmanager.h"
+#include "lego/legoomni/include/legocachesoundlist.h"
+#include "lego/legoomni/include/legocachesoundmanager.h"
+#include "lego/legoomni/include/legocachsound.h"
+#include "lego/legoomni/include/legocameracontroller.h"
+#include "lego/legoomni/include/legocarbuild.h"
+#include "lego/legoomni/include/legocarbuildpresenter.h"
+#include "lego/legoomni/include/legocharactermanager.h"
+#include "lego/legoomni/include/legocontrolmanager.h"
+#include "lego/legoomni/include/legoendanimnotificationparam.h"
+#include "lego/legoomni/include/legoentity.h"
+#include "lego/legoomni/include/legoentitylist.h"
+#include "lego/legoomni/include/legoentitypresenter.h"
+#include "lego/legoomni/include/legoeventnotificationparam.h"
+#include "lego/legoomni/include/legoextraactor.h"
+#include "lego/legoomni/include/legoflctexturepresenter.h"
+#include "lego/legoomni/include/legogamestate.h"
+#include "lego/legoomni/include/legohideanimpresenter.h"
+#include "lego/legoomni/include/legoinputmanager.h"
+#include "lego/legoomni/include/legoloadcachesoundpresenter.h"
+#include "lego/legoomni/include/legolocations.h"
+#include "lego/legoomni/include/legolocomotionanimpresenter.h"
+#include "lego/legoomni/include/legolodlist.h"
+#include "lego/legoomni/include/legoloopinganimpresenter.h"
+#include "lego/legoomni/include/legomain.h"
+#include "lego/legoomni/include/legometerpresenter.h"
+#include "lego/legoomni/include/legomodelpresenter.h"
+#include "lego/legoomni/include/legonamedpart.h"
+#include "lego/legoomni/include/legonamedpartlist.h"
+#include "lego/legoomni/include/legonamedplane.h"
+#include "lego/legoomni/include/legonamedtexture.h"
+#include "lego/legoomni/include/legonamedtexturelist.h"
+#include "lego/legoomni/include/legonavcontroller.h"
+#include "lego/legoomni/include/legoobjectfactory.h"
+#include "lego/legoomni/include/legopalettepresenter.h"
+#include "lego/legoomni/include/legopartpresenter.h"
+#include "lego/legoomni/include/legopathactor.h"
+#include "lego/legoomni/include/legopathboundary.h"
+#include "lego/legoomni/include/legopathcontroller.h"
+#include "lego/legoomni/include/legopathcontrollerlist.h"
+#include "lego/legoomni/include/legopathedgecontainer.h"
+#include "lego/legoomni/include/legopathpresenter.h"
+#include "lego/legoomni/include/legopathstruct.h"
+#include "lego/legoomni/include/legophoneme.h"
+#include "lego/legoomni/include/legophonemelist.h"
+#include "lego/legoomni/include/legophonemepresenter.h"
+#include "lego/legoomni/include/legoplantmanager.h"
+#include "lego/legoomni/include/legoplants.h"
+#include "lego/legoomni/include/legopointofviewcontroller.h"
+#include "lego/legoomni/include/legorace.h"
+#include "lego/legoomni/include/legoraceactor.h"
+#include "lego/legoomni/include/legoracemap.h"
+#include "lego/legoomni/include/legoracers.h"
+#include "lego/legoomni/include/legoracespecial.h"
+#include "lego/legoomni/include/legoroilist.h"
+#include "lego/legoomni/include/legoroimaplist.h"
+#include "lego/legoomni/include/legosoundmanager.h"
+#include "lego/legoomni/include/legostate.h"
+#include "lego/legoomni/include/legotextureinfo.h"
+#include "lego/legoomni/include/legotexturepresenter.h"
+#include "lego/legoomni/include/legotraninfo.h"
+#include "lego/legoomni/include/legotraninfolist.h"
+#include "lego/legoomni/include/legoutils.h"
+#include "lego/legoomni/include/legovariables.h"
+#include "lego/legoomni/include/legovideomanager.h"
+#include "lego/legoomni/include/legoworld.h"
+#include "lego/legoomni/include/legoworldlist.h"
+#include "lego/legoomni/include/legoworldpresenter.h"
+#include "lego/legoomni/include/misc.h"
+#include "lego/legoomni/include/motorcycle.h"
+#include "lego/legoomni/include/mxbackgroundaudiomanager.h"
+#include "lego/legoomni/include/mxcompositemediapresenter.h"
+#include "lego/legoomni/include/mxcontrolpresenter.h"
+#include "lego/legoomni/include/mxtransitionmanager.h"
+#include "lego/legoomni/include/pizza.h"
+#include "lego/legoomni/include/pizzeria.h"
+#include "lego/legoomni/include/police.h"
+#include "lego/legoomni/include/racecar.h"
+#include "lego/legoomni/include/raceskel.h"
+#include "lego/legoomni/include/radio.h"
+#include "lego/legoomni/include/registrationbook.h"
+#include "lego/legoomni/include/score.h"
+#include "lego/legoomni/include/scripts.h"
+#include "lego/legoomni/include/skateboard.h"
+#include "lego/legoomni/include/towtrack.h"
+#include "lego/sources/3dmanager/lego3dmanager.h"
+#include "lego/sources/3dmanager/lego3dview.h"
+#include "lego/sources/3dmanager/legoview1.h"
+#include "lego/sources/3dmanager/tglsurface.h"
+#include "lego/sources/anim/legoanim.h"
+#include "lego/sources/geom/legoedge.h"
+#include "lego/sources/geom/legounkown100db7f4.h"
+#include "lego/sources/geom/legoweedge.h"
+#include "lego/sources/geom/legowegedge.h"
+#include "lego/sources/misc/legocontainer.h"
+#include "lego/sources/misc/legoimage.h"
+#include "lego/sources/misc/legostorage.h"
+#include "lego/sources/misc/legotexture.h"
+#include "lego/sources/misc/legotree.h"
+#include "lego/sources/misc/legotypes.h"
+#include "lego/sources/misc/legounknown.h"
+#include "lego/sources/misc/legoutil.h"
+#include "lego/sources/misc/version.h"
+#include "lego/sources/roi/legolod.h"
+#include "lego/sources/roi/legoroi.h"
+#include "lego/sources/shape/legobox.h"
+#include "lego/sources/shape/legocolor.h"
+#include "lego/sources/shape/legomesh.h"
+#include "lego/sources/shape/legosphere.h"
+#include "lego/sources/shape/legovertex.h"
+#include "lego1_export.h"
+#include "lego1_pch.h"
+#include "library_msvc.h"
+#include "library_smack.h"
+#include "modeldb/modeldb.h"
+#include "mxdirectx/legodxinfo.h"
+#include "mxdirectx/mxdirect3d.h"
+#include "mxdirectx/mxdirectdraw.h"
+#include "mxdirectx/mxdirectxinfo.h"
+#include "mxdirectx/mxstopwatch.h"
+#include "mxgeometry/mxgeometry3d.h"
+#include "mxgeometry/mxgeometry4d.h"
+#include "mxgeometry/mxmatrix.h"
+#include "mxgeometry/mxquaternion.h"
+#include "omni/include/flic.h"
+#include "omni/include/mxactionnotificationparam.h"
+#include "omni/include/mxatom.h"
+#include "omni/include/mxaudiomanager.h"
+#include "omni/include/mxaudiopresenter.h"
+#include "omni/include/mxautolock.h"
+#include "omni/include/mxbitmap.h"
+#include "omni/include/mxbitset.h"
+#include "omni/include/mxcollection.h"
+#include "omni/include/mxcompositepresenter.h"
+#include "omni/include/mxcore.h"
+#include "omni/include/mxcriticalsection.h"
+#include "omni/include/mxdebug.h"
+#include "omni/include/mxdiskstreamcontroller.h"
+#include "omni/include/mxdiskstreamprovider.h"
+#include "omni/include/mxdisplaysurface.h"
+#include "omni/include/mxdsaction.h"
+#include "omni/include/mxdsactionlist.h"
+#include "omni/include/mxdsanim.h"
+#include "omni/include/mxdsbuffer.h"
+#include "omni/include/mxdschunk.h"
+#include "omni/include/mxdsevent.h"
+#include "omni/include/mxdsfile.h"
+#include "omni/include/mxdsmediaaction.h"
+#include "omni/include/mxdsmultiaction.h"
+#include "omni/include/mxdsobject.h"
+#include "omni/include/mxdsobjectaction.h"
+#include "omni/include/mxdsparallelaction.h"
+#include "omni/include/mxdsselectaction.h"
+#include "omni/include/mxdsserialaction.h"
+#include "omni/include/mxdssound.h"
+#include "omni/include/mxdssource.h"
+#include "omni/include/mxdsstill.h"
+#include "omni/include/mxdsstreamingaction.h"
+#include "omni/include/mxdssubscriber.h"
+#include "omni/include/mxentity.h"
+#include "omni/include/mxeventmanager.h"
+#include "omni/include/mxeventpresenter.h"
+#include "omni/include/mxflcpresenter.h"
+#include "omni/include/mxgeometry.h"
+#include "omni/include/mxhashtable.h"
+#include "omni/include/mxio.h"
+#include "omni/include/mxlist.h"
+#include "omni/include/mxloopingflcpresenter.h"
+#include "omni/include/mxloopingsmkpresenter.h"
+#include "omni/include/mxmediamanager.h"
+#include "omni/include/mxmediapresenter.h"
+#include "omni/include/mxmemorypool.h"
+#include "omni/include/mxmisc.h"
+#include "omni/include/mxnextactiondatastart.h"
+#include "omni/include/mxnotificationmanager.h"
+#include "omni/include/mxnotificationparam.h"
+#include "omni/include/mxobjectfactory.h"
+#include "omni/include/mxomni.h"
+#include "omni/include/mxomnicreateflags.h"
+#include "omni/include/mxomnicreateparam.h"
+#include "omni/include/mxpalette.h"
+#include "omni/include/mxparam.h"
+#include "omni/include/mxpresenter.h"
+#include "omni/include/mxpresenterlist.h"
+#include "omni/include/mxqueue.h"
+#include "omni/include/mxramstreamcontroller.h"
+#include "omni/include/mxramstreamprovider.h"
+#include "omni/include/mxregion.h"
+#include "omni/include/mxscheduler.h"
+#include "omni/include/mxsemaphore.h"
+#include "omni/include/mxsmk.h"
+#include "omni/include/mxsmkpresenter.h"
+#include "omni/include/mxsoundmanager.h"
+#include "omni/include/mxsoundpresenter.h"
+#include "omni/include/mxstillpresenter.h"
+#include "omni/include/mxstreamchunk.h"
+#include "omni/include/mxstreamchunklist.h"
+#include "omni/include/mxstreamcontroller.h"
+#include "omni/include/mxstreamer.h"
+#include "omni/include/mxstreamprovider.h"
+#include "omni/include/mxstring.h"
+#include "omni/include/mxstringlist.h"
+#include "omni/include/mxthread.h"
+#include "omni/include/mxticklemanager.h"
+#include "omni/include/mxticklethread.h"
+#include "omni/include/mxtimer.h"
+#include "omni/include/mxtypes.h"
+#include "omni/include/mxutilities.h"
+#include "omni/include/mxutilitylist.h"
+#include "omni/include/mxvariable.h"
+#include "omni/include/mxvariabletable.h"
+#include "omni/include/mxvideomanager.h"
+#include "omni/include/mxvideoparam.h"
+#include "omni/include/mxvideoparamflags.h"
+#include "omni/include/mxvideopresenter.h"
+#include "omni/include/mxwavepresenter.h"
+#include "realtime/lodlist.h"
+#include "realtime/matrix.h"
+#include "realtime/matrix4d.inl.h"
+#include "realtime/orientableroi.h"
+#include "realtime/realtime.h"
+#include "realtime/realtimeview.h"
+#include "realtime/roi.h"
+#include "realtime/vector.h"
+#include "realtime/vector2d.inl.h"
+#include "realtime/vector3d.inl.h"
+#include "realtime/vector4d.inl.h"
+#include "res/resource.h"
+#include "tgl/d3drm/impl.h"
+#include "tgl/tgl.h"
+#include "tgl/tglvector.h"
+#include "viewmanager/viewlod.h"
+#include "viewmanager/viewlodlist.h"
+#include "viewmanager/viewmanager.h"
+#include "viewmanager/viewroi.h"
+
+#endif
diff --git a/LEGO1/omni/include/mxhashtable.h b/LEGO1/omni/include/mxhashtable.h
index e15128e9..65ce11a0 100644
--- a/LEGO1/omni/include/mxhashtable.h
+++ b/LEGO1/omni/include/mxhashtable.h
@@ -13,7 +13,7 @@ class MxHashTableCursor;
 template <class T>
 class MxHashTableNode {
 public:
-	MxHashTableNode<T>(T p_obj, MxU32 p_hash, MxHashTableNode* p_prev, MxHashTableNode* p_next)
+	MxHashTableNode(T p_obj, MxU32 p_hash, MxHashTableNode* p_prev, MxHashTableNode* p_next)
 	{
 		m_obj = p_obj;
 		m_hash = p_hash;
diff --git a/LEGO1/realtime/matrix.h b/LEGO1/realtime/matrix.h
index bbadcdf2..ceadf97f 100644
--- a/LEGO1/realtime/matrix.h
+++ b/LEGO1/realtime/matrix.h
@@ -22,6 +22,8 @@ class Matrix4 {
 	// FUNCTION: BETA10 0x1000fc70
 	Matrix4(float (*p_data)[4]) { SetData(p_data); }
 
+	virtual ~Matrix4() {}
+
 	inline virtual void Equals(float (*p_data)[4]);                                           // vtable+0x04
 	inline virtual void Equals(const Matrix4& p_matrix);                                      // vtable+0x00
 	inline virtual void SetData(float (*p_data)[4]);                                          // vtable+0x0c
diff --git a/miniwin/miniwin/include/miniwin_d3drm.h b/miniwin/miniwin/include/miniwin_d3drm.h
index c2835e89..dfd8b66f 100644
--- a/miniwin/miniwin/include/miniwin_d3drm.h
+++ b/miniwin/miniwin/include/miniwin_d3drm.h
@@ -145,7 +145,6 @@ struct D3DRMVERTEX {
 };
 
 struct IDirect3DRMObject : public IUnknown {
-	virtual HRESULT Clone(void** ppObject) = 0;
 	virtual HRESULT AddDestroyCallback(D3DRMOBJECTCALLBACK callback, void* arg) = 0;
 	virtual HRESULT DeleteDestroyCallback(D3DRMOBJECTCALLBACK callback, void* arg) = 0;
 	virtual HRESULT SetAppData(LPD3DRM_APPDATA appData) = 0;
diff --git a/miniwin/miniwin/src/miniwin_d3drm.cpp b/miniwin/miniwin/src/miniwin_d3drm.cpp
index b4ed7f87..6bd62a08 100644
--- a/miniwin/miniwin/src/miniwin_d3drm.cpp
+++ b/miniwin/miniwin/src/miniwin_d3drm.cpp
@@ -188,11 +188,6 @@ struct Direct3DRMObjectBase : public T {
 };
 
 struct Direct3DRMMeshImpl : public Direct3DRMObjectBase<IDirect3DRMMesh> {
-	HRESULT Clone(void** ppObject) override
-	{
-		*ppObject = static_cast<void*>(new Direct3DRMMeshImpl);
-		return DD_OK;
-	}
 	HRESULT Clone(int flags, GUID iid, void** object) override
 	{
 		if (SDL_memcmp(&iid, &IID_IDirect3DRMMesh, sizeof(GUID)) == 0) {
@@ -259,11 +254,6 @@ struct Direct3DRMTextureImpl : public Direct3DRMObjectBase<IDirect3DRMTexture2>
 		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Direct3DRMTextureImpl does not implement guid");
 		return E_NOINTERFACE;
 	}
-	HRESULT Clone(void** ppObject) override
-	{
-		*ppObject = static_cast<void*>(new Direct3DRMTextureImpl);
-		return DD_OK;
-	}
 	HRESULT Changed(BOOL pixels, BOOL palette) override { return DD_OK; }
 };
 
@@ -274,11 +264,6 @@ struct Direct3DRMDevice2Impl : public Direct3DRMObjectBase<IDirect3DRMDevice2> {
 		m_viewports->AddRef();
 	}
 	~Direct3DRMDevice2Impl() override { m_viewports->Release(); }
-	HRESULT Clone(void** ppObject) override
-	{
-		*ppObject = static_cast<void*>(new Direct3DRMDevice2Impl);
-		return DD_OK;
-	}
 	unsigned int GetWidth() override { return 640; }
 	unsigned int GetHeight() override { return 480; }
 	HRESULT SetBufferCount(int count) override { return DD_OK; }
@@ -324,11 +309,6 @@ struct Direct3DRMFrameImpl : public Direct3DRMObjectBase<IDirect3DRMFrame2> {
 			m_texture->Release();
 		}
 	}
-	HRESULT Clone(void** ppObject) override
-	{
-		*ppObject = static_cast<void*>(new Direct3DRMFrameImpl);
-		return DD_OK;
-	}
 	HRESULT AddChild(IDirect3DRMFrame* child) override { return m_children->AddElement(child); }
 	HRESULT DeleteChild(IDirect3DRMFrame* child) override { return m_children->DeleteElement(child); }
 	HRESULT SetSceneBackgroundRGB(float r, float g, float b) override { return DD_OK; }
@@ -390,11 +370,6 @@ struct Direct3DRMFrameImpl : public Direct3DRMObjectBase<IDirect3DRMFrame2> {
 };
 
 struct Direct3DRMViewportImpl : public Direct3DRMObjectBase<IDirect3DRMViewport> {
-	HRESULT Clone(void** ppObject) override
-	{
-		*ppObject = static_cast<void*>(new Direct3DRMViewportImpl);
-		return DD_OK;
-	}
 	HRESULT Render(IDirect3DRMFrame* group) override { return DD_OK; }
 	HRESULT ForceUpdate(int x, int y, int w, int h) override { return DD_OK; }
 	HRESULT Clear() override { return DD_OK; }
@@ -427,21 +402,10 @@ struct Direct3DRMViewportImpl : public Direct3DRMObjectBase<IDirect3DRMViewport>
 };
 
 struct Direct3DRMLightImpl : public Direct3DRMObjectBase<IDirect3DRMLight> {
-	HRESULT Clone(void** ppObject) override
-	{
-		*ppObject = static_cast<void*>(new Direct3DRMLightImpl);
-		return DD_OK;
-	}
 	HRESULT SetColorRGB(float r, float g, float b) override { return DD_OK; }
 };
 
-struct Direct3DRMMaterialImpl : public Direct3DRMObjectBase<IDirect3DRMMaterial> {
-	HRESULT Clone(void** ppObject) override
-	{
-		*ppObject = static_cast<void*>(new Direct3DRMMaterialImpl);
-		return DD_OK;
-	}
-};
+struct Direct3DRMMaterialImpl : public Direct3DRMObjectBase<IDirect3DRMMaterial> {};
 
 struct Direct3DRMImpl : virtual public IDirect3DRM2 {
 	// IUnknown interface