diff --git a/LEGO1/lego/legoomni/include/legomodelpresenter.h b/LEGO1/lego/legoomni/include/legomodelpresenter.h
index 480de885..8bc784a4 100644
--- a/LEGO1/lego/legoomni/include/legomodelpresenter.h
+++ b/LEGO1/lego/legoomni/include/legomodelpresenter.h
@@ -36,7 +36,7 @@ class LegoModelPresenter : public MxVideoPresenter {
 	void ParseExtra() override;  // vtable+0x30
 	void Destroy() override;     // vtable+0x38
 
-	MxResult FUN_1007ff70(MxDSChunk& p_chunk, LegoEntity* p_entity, undefined p_modelUnknown0x34, LegoWorld* p_world);
+	MxResult FUN_1007ff70(MxDSChunk& p_chunk, LegoEntity* p_entity, MxBool p_roiVisible, LegoWorld* p_world);
 
 	inline void Reset()
 	{
diff --git a/LEGO1/lego/legoomni/include/legonavcontroller.h b/LEGO1/lego/legoomni/include/legonavcontroller.h
index a4ae8b21..f5f0d44f 100644
--- a/LEGO1/lego/legoomni/include/legonavcontroller.h
+++ b/LEGO1/lego/legoomni/include/legonavcontroller.h
@@ -71,7 +71,7 @@ class LegoNavController : public MxCore {
 		MxBool p_urs
 	);
 	static void SetLocation(MxU32 p_location);
-	void UpdateCameraLocation(char* p_location);
+	static void UpdateCameraLocation(const char* p_location);
 
 	// SYNTHETIC: LEGO1 0x10054c10
 	// LegoNavController::`scalar deleting destructor'
diff --git a/LEGO1/lego/legoomni/src/common/legovariables.cpp b/LEGO1/lego/legoomni/src/common/legovariables.cpp
index c775b9aa..d4689af5 100644
--- a/LEGO1/lego/legoomni/src/common/legovariables.cpp
+++ b/LEGO1/lego/legoomni/src/common/legovariables.cpp
@@ -31,6 +31,10 @@ const char* g_varCURSOR = "CURSOR";
 // STRING: LEGO1 0x100f3a1c
 const char* g_varWHOAMI = "WHO_AM_I";
 
+// GLOBAL: LEGO1 0x100f3a50
+// STRING: LEGO1 0x100f3a18
+const char* g_delimiter2 = " \t";
+
 // GLOBAL: LEGO1 0x100f3a54
 // STRING: LEGO1 0x100f3a10
 const char* g_varHIDE = "HIDE";
@@ -59,15 +63,14 @@ const char* g_nick = "Nick";
 // STRING: LEGO1 0x100f39e0
 const char* g_laura = "Laura";
 
-extern const char* g_delimiter;
-
 // FUNCTION: LEGO1 0x10037d00
 void VisibilityVariable::SetValue(const char* p_value)
 {
 	MxVariable::SetValue(p_value);
+
 	if (p_value) {
-		char* instruction = strtok(m_value.GetDataPtr(), g_delimiter);
-		char* name = strtok(NULL, g_delimiter);
+		char* instruction = strtok(m_value.GetDataPtr(), g_delimiter2);
+		char* name = strtok(NULL, g_delimiter2);
 		MxBool show;
 
 		if (!strcmpi(instruction, g_varHIDE)) {
diff --git a/LEGO1/lego/legoomni/src/entity/legonavcontroller.cpp b/LEGO1/lego/legoomni/src/entity/legonavcontroller.cpp
index f2b2dfae..a6578c3d 100644
--- a/LEGO1/lego/legoomni/src/entity/legonavcontroller.cpp
+++ b/LEGO1/lego/legoomni/src/entity/legonavcontroller.cpp
@@ -362,8 +362,9 @@ MxBool LegoNavController::CalculateNewPosDir(
 }
 
 // STUB: LEGO1 0x10055500
-void LegoNavController::UpdateCameraLocation(char* p_location)
+void LegoNavController::UpdateCameraLocation(const char* p_location)
 {
+	// TODO
 }
 
 // STUB: LEGO1 0x10055620
diff --git a/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp b/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
index 6e7dd28b..aee10656 100644
--- a/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
+++ b/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
@@ -162,7 +162,7 @@ void LegoAnimPresenter::FUN_100692b0()
 				roi = CharacterManager()->FUN_10083500(src, TRUE);
 
 				if (roi != NULL && str[0] == '*') {
-					roi->SetVisibility(0);
+					roi->SetVisibility(FALSE);
 				}
 			}
 			else if (unk0x04 == 4) {
@@ -174,7 +174,7 @@ void LegoAnimPresenter::FUN_100692b0()
 				roi = CharacterManager()->FUN_10085a80(und, src, 1);
 
 				if (roi != NULL) {
-					roi->SetVisibility(0);
+					roi->SetVisibility(FALSE);
 				}
 
 				delete[] src;
diff --git a/LEGO1/lego/legoomni/src/video/legomodelpresenter.cpp b/LEGO1/lego/legoomni/src/video/legomodelpresenter.cpp
index 5c4d6e44..af207540 100644
--- a/LEGO1/lego/legoomni/src/video/legomodelpresenter.cpp
+++ b/LEGO1/lego/legoomni/src/video/legomodelpresenter.cpp
@@ -208,7 +208,7 @@ MxResult LegoModelPresenter::CreateROI(MxDSChunk* p_chunk)
 MxResult LegoModelPresenter::FUN_1007ff70(
 	MxDSChunk& p_chunk,
 	LegoEntity* p_entity,
-	undefined p_modelUnknown0x34,
+	undefined p_roiVisible,
 	LegoWorld* p_world
 )
 {
@@ -222,7 +222,7 @@ MxResult LegoModelPresenter::FUN_1007ff70(
 	}
 
 	if (m_roi != NULL) {
-		m_roi->SetVisibility(p_modelUnknown0x34);
+		m_roi->SetVisibility(p_roiVisible);
 	}
 
 	if (p_entity != NULL) {
diff --git a/LEGO1/lego/legoomni/src/worlds/infocenter.cpp b/LEGO1/lego/legoomni/src/worlds/infocenter.cpp
index 60af9f1e..88a04570 100644
--- a/LEGO1/lego/legoomni/src/worlds/infocenter.cpp
+++ b/LEGO1/lego/legoomni/src/worlds/infocenter.cpp
@@ -296,8 +296,8 @@ MxLong Infocenter::HandleEndAction(MxEndActionNotificationParam& p_param)
 		m_currentCutscene = e_noIntro;
 		return 1;
 	case 2:
-		SetROIVisible(g_object2x4red, 0);
-		SetROIVisible(g_object2x4grn, 0);
+		SetROIVisible(g_object2x4red, FALSE);
+		SetROIVisible(g_object2x4grn, FALSE);
 		BackgroundAudioManager()->RaiseVolume();
 		return 1;
 	case 4:
@@ -329,7 +329,7 @@ MxLong Infocenter::HandleEndAction(MxEndActionNotificationParam& p_param)
 		}
 
 		m_infocenterState->SetUnknown0x74(2);
-		SetROIVisible("infoman", 1);
+		SetROIVisible("infoman", TRUE);
 		return 1;
 	case 12:
 		if (action->GetObjectId() == m_currentInfomainScript) {
@@ -1067,15 +1067,15 @@ MxLong Infocenter::HandleNotification0(MxNotificationParam& p_param)
 			}
 
 			PlayAction(objectId);
-			SetROIVisible(g_object2x4red, 0);
-			SetROIVisible(g_object2x4grn, 0);
+			SetROIVisible(g_object2x4red, FALSE);
+			SetROIVisible(g_object2x4grn, FALSE);
 			return 1;
 		}
 		case 6:
 			if (m_infocenterState->GetUnknown0x74() == 8) {
 				StopCurrentAction();
-				SetROIVisible(g_object2x4red, 0);
-				SetROIVisible(g_object2x4grn, 0);
+				SetROIVisible(g_object2x4red, FALSE);
+				SetROIVisible(g_object2x4grn, FALSE);
 				m_infocenterState->SetUnknown0x74(2);
 				PlayAction(InfomainScript::c_iicb28in_RunAnim);
 				return 1;
diff --git a/LEGO1/lego/legoomni/src/worlds/isle.cpp b/LEGO1/lego/legoomni/src/worlds/isle.cpp
index 903dcb42..ce5cf365 100644
--- a/LEGO1/lego/legoomni/src/worlds/isle.cpp
+++ b/LEGO1/lego/legoomni/src/worlds/isle.cpp
@@ -773,11 +773,11 @@ void Isle::Enable(MxBool p_enable)
 			FUN_10015820(FALSE, LegoOmni::c_disableInput | LegoOmni::c_disable3d | LegoOmni::c_clearScreen);
 		}
 
-		SetROIVisible("stretch", 0);
-		SetROIVisible("bird", 0);
-		SetROIVisible("rcred", 0);
-		SetROIVisible("towtk", 0);
-		SetROIVisible("pizpie", 0);
+		SetROIVisible("stretch", FALSE);
+		SetROIVisible("bird", FALSE);
+		SetROIVisible("rcred", FALSE);
+		SetROIVisible("towtk", FALSE);
+		SetROIVisible("pizpie", FALSE);
 	}
 	else {
 		if (InputManager()->GetWorld() == this) {
diff --git a/LEGO1/lego/legoomni/src/worlds/registrationbook.cpp b/LEGO1/lego/legoomni/src/worlds/registrationbook.cpp
index fcc3fcb9..3f0a6108 100644
--- a/LEGO1/lego/legoomni/src/worlds/registrationbook.cpp
+++ b/LEGO1/lego/legoomni/src/worlds/registrationbook.cpp
@@ -324,7 +324,7 @@ void RegistrationBook::ReadyWorld()
 
 		LegoROI* infoman = FindROI(g_infoman);
 		if (infoman != NULL) {
-			infoman->SetVisibility(0);
+			infoman->SetVisibility(FALSE);
 		}
 	}
 	else {
diff --git a/LEGO1/realtime/roi.h b/LEGO1/realtime/roi.h
index a529e1ae..e0a9a6da 100644
--- a/LEGO1/realtime/roi.h
+++ b/LEGO1/realtime/roi.h
@@ -112,16 +112,16 @@ class ROI {
 	int GetLODCount() const { return lods ? lods->Size() : 0; }
 	const CompoundObject* GetComp() const { return comp; }
 
-	inline char GetVisibility() { return m_visible; }
-	inline void SetVisibility(char p_visible) { m_visible = p_visible; }
+	inline unsigned char GetVisibility() { return m_visible; }
+	inline void SetVisibility(unsigned char p_visible) { m_visible = p_visible; }
 
 	// SYNTHETIC: LEGO1 0x100a5d60
 	// ROI::`scalar deleting destructor'
 
 protected:
-	CompoundObject* comp; // 0x04
-	LODListBase* lods;    // 0x08
-	char m_visible;       // 0x0c
+	CompoundObject* comp;    // 0x04
+	LODListBase* lods;       // 0x08
+	unsigned char m_visible; // 0x0c
 };
 
 // TEMPLATE: LEGO1 0x10084930