diff --git a/lroom.cpp b/lroom.cpp
index 3ea882c..6ccfb5a 100644
--- a/lroom.cpp
+++ b/lroom.cpp
@@ -33,6 +33,9 @@ LRoom::LRoom() {
 	m_iFirstPortal = 0;
 	m_iNumPortals = 0;
 	m_bVisible = true;
+
+	m_iFirstSOB = 0;
+	m_iNumSOBs = 0;
 }
 
 
@@ -169,9 +172,10 @@ void LRoom::FinalizeVisibility(LRoomManager &manager)
 {
 	//print_line("FinalizeVisibility room " + get_name() + " NumSOBs " + itos(m_SOBs.size()) + ", NumDOBs " + itos(m_DOBs.size()));
 
-	for (int n=0; n<m_SOBs.size(); n++)
+	int last_sob = m_iFirstSOB + m_iNumSOBs;
+	for (int n=m_iFirstSOB; n<last_sob; n++)
 	{
-		const LSob &sob = m_SOBs[n];
+		const LSob &sob = manager.m_SOBs[n];
 		VisualInstance * pVI = sob.GetVI();
 
 		if (pVI)
@@ -299,8 +303,14 @@ void LRoom::FirstTouch(LRoomManager &manager)
 	manager.m_pCurr_VisibleRoomList->push_back(m_RoomID);
 
 	// hide all objects
-	for (int n=0; n<m_SOBs.size(); n++)
-		m_SOBs[n].m_bVisible = false;
+	int last_sob = m_iFirstSOB + m_iNumSOBs;
+	for (int n=m_iFirstSOB; n<last_sob; n++)
+	{
+		LSob &sob = manager.m_SOBs[n];
+		sob.m_bVisible = false;
+	}
+//	for (int n=0; n<m_SOBs.size(); n++)
+//		m_SOBs[n].m_bVisible = false;
 
 	// hide all dobs
 	for (int n=0; n<m_DOBs.size(); n++)
@@ -335,9 +345,13 @@ void LRoom::DetermineVisibility_Recursive(LRoomManager &manager, int depth, cons
 #ifdef LPORTAL_CULL_STATIC
 
 	// clip all objects in this room to the clipping planes
-	for (int n=0; n<m_SOBs.size(); n++)
+	int last_sob = m_iFirstSOB + m_iNumSOBs;
+	for (int n=m_iFirstSOB; n<last_sob; n++)
 	{
-		LSob &sob = m_SOBs[n];
+		LSob &sob = manager.m_SOBs[n];
+//	for (int n=0; n<m_SOBs.size(); n++)
+//	{
+//		LSob &sob = m_SOBs[n];
 
 		// already determined to be visible through another portal
 		if (sob.m_bVisible)
diff --git a/lroom.h b/lroom.h
index 12e3512..65b0c39 100644
--- a/lroom.h
+++ b/lroom.h
@@ -57,8 +57,12 @@ public:
 	static const int SOFT_SHOW_BIT = 18;
 	static const int SOFT_HIDE_BIT = 19;
 
+	// static objects are stored in the manager in a contiguous list
+	int m_iFirstSOB;
+	int m_iNumSOBs;
+
 	// static objects
-	LVector<LSob> m_SOBs;
+	//LVector<LSob> m_SOBs;
 
 	// dynamic objects
 	LVector<LDob> m_DOBs;
diff --git a/lroom_converter.cpp b/lroom_converter.cpp
index 0b46d30..4b0109c 100644
--- a/lroom_converter.cpp
+++ b/lroom_converter.cpp
@@ -41,6 +41,8 @@ void LRoomConverter::Convert(LRoomManager &manager)
 	LMAN = &manager;
 	int count = CountRooms();
 
+	LMAN->m_SOBs.clear();
+
 	// make sure bitfield is right size for number of rooms
 	LMAN->m_BF_visible_rooms.Create(count);
 
@@ -129,7 +131,8 @@ void LRoomConverter::Convert_Room_FindObjects_Recursive(Node * pParent, LRoom &l
 			sob.m_ID = pVI->get_instance_id();
 			sob.m_aabb = bb;
 
-			lroom.m_SOBs.push_back(sob);
+			//lroom.m_SOBs.push_back(sob);
+			LRoom_PushBackSOB(lroom, sob);
 		}
 		else
 		{
@@ -409,6 +412,17 @@ void LRoomConverter::LRoom_DetectPortalMeshes(LRoom &lroom, LTempRoom &troom)
 
 }
 
+void LRoomConverter::LRoom_PushBackSOB(LRoom &lroom, const LSob &sob)
+{
+	// first added for this room?
+	if (lroom.m_iNumSOBs == 0)
+		lroom.m_iFirstSOB = LMAN->m_SOBs.size();
+
+	LMAN->m_SOBs.push_back(sob);
+	lroom.m_iNumSOBs++;
+}
+
+
 // handles the slight faff involved in getting a new portal in the manager contiguous list of portals
 LPortal * LRoomConverter::LRoom_RequestNewPortal(LRoom &lroom)
 {
diff --git a/lroom_converter.h b/lroom_converter.h
index 1880d58..8919449 100644
--- a/lroom_converter.h
+++ b/lroom_converter.h
@@ -100,6 +100,7 @@ private:
 	void LRoom_MakePortalFinalList(LRoom &lroom, LTempRoom &troom);
 	void LRoom_DetectedPortalMesh(LRoom &lroom, LTempRoom &troom, MeshInstance * pMeshInstance, String szLinkRoom);
 	LPortal * LRoom_RequestNewPortal(LRoom &lroom);
+	void LRoom_PushBackSOB(LRoom &lroom, const LSob &sob);
 
 	void TRoom_MakeOppositePortal(const LPortal &port, int iRoomOrig);
 
diff --git a/lroom_manager.h b/lroom_manager.h
index 7f19884..bce68ce 100644
--- a/lroom_manager.h
+++ b/lroom_manager.h
@@ -159,6 +159,9 @@ private:
 	LVector<LRoom> m_Rooms;
 	LVector<LPortal> m_Portals;
 
+	// static objects
+	LVector<LSob> m_SOBs;
+
 public:
 	// whether debug planes is switched on
 	bool m_bDebugPlanes;