diff --git a/LEGO1/lego/legoomni/include/legocarbuildpresenter.h b/LEGO1/lego/legoomni/include/legocarbuildpresenter.h
index 8084da7c..b7b02d52 100644
--- a/LEGO1/lego/legoomni/include/legocarbuildpresenter.h
+++ b/LEGO1/lego/legoomni/include/legocarbuildpresenter.h
@@ -45,7 +45,11 @@ class LegoCarBuildAnimPresenter : public LegoAnimPresenter {
 	void EndAction() override;       // vtable+0x40
 	void PutFrame() override;        // vtable+0x6c
 
+	void FUN_10079050(MxS16 p_index);
+	void FUN_10079090(LegoChar* p_param1, LegoChar* p_param2);
 	void FUN_10079160();
+	void FUN_100795d0(LegoChar* p_param);
+	void FUN_10079680(LegoChar* p_param);
 	void RotateAroundYAxis(MxFloat p_angle);
 	MxBool FUN_10079c30(const LegoChar* p_name);
 	MxBool FUN_10079ca0(const LegoChar* p_name);
@@ -77,7 +81,9 @@ class LegoCarBuildAnimPresenter : public LegoAnimPresenter {
 	LegoEntity* m_unk0x140;       // 0x140
 	MxS32 m_unk0x144;             // 0x144
 	MxS32 m_unk0x148;             // 0x148
-	undefined* m_unk0x14c;        // 0x14c
+
+	// name verified by BETA10 0x10070d63
+	LegoChar* m_mainSourceId; // 0x14c
 };
 
 #endif // LEGOCARBUILDPRESENTER_H
diff --git a/LEGO1/lego/legoomni/include/legoutils.h b/LEGO1/lego/legoomni/include/legoutils.h
index 9e8c91fc..b6143c36 100644
--- a/LEGO1/lego/legoomni/include/legoutils.h
+++ b/LEGO1/lego/legoomni/include/legoutils.h
@@ -43,6 +43,7 @@ void FUN_1003dde0(LegoROI* p_param1, MxFloat p_param2);
 MxBool FUN_1003ded0(MxFloat p_param1[2], MxFloat p_param2[3], MxFloat p_param3[3]);
 MxBool TransformWorldToScreen(const MxFloat p_world[3], MxFloat p_screen[4]);
 MxS16 CountTotalTreeNodes(LegoTreeNode* p_node);
+LegoTreeNode* GetTreeNode(LegoTreeNode* p_node, MxU32 p_index);
 void FUN_1003e050(LegoAnimPresenter* p_presenter);
 Extra::ActionType MatchActionString(const char*);
 void InvokeAction(Extra::ActionType p_actionId, const MxAtomId& p_pAtom, MxS32 p_targetEntityId, LegoEntity* p_sender);
diff --git a/LEGO1/lego/legoomni/include/legovideomanager.h b/LEGO1/lego/legoomni/include/legovideomanager.h
index edfd345e..605d0626 100644
--- a/LEGO1/lego/legoomni/include/legovideomanager.h
+++ b/LEGO1/lego/legoomni/include/legovideomanager.h
@@ -53,7 +53,9 @@ class LegoVideoManager : public MxVideoManager {
 	// FUNCTION: BETA10 0x100117e0
 	Lego3DManager* Get3DManager() { return m_3dManager; }
 
+	// FUNCTION: BETA10 0x1003a380
 	LegoROI* GetViewROI() { return m_viewROI; }
+
 	MxDirect3D* GetDirect3D() { return m_direct3d; }
 	MxBool GetRender3D() { return m_render3d; }
 	double GetElapsedSeconds() { return m_elapsedSeconds; }
diff --git a/LEGO1/lego/legoomni/src/build/legocarbuildpresenter.cpp b/LEGO1/lego/legoomni/src/build/legocarbuildpresenter.cpp
index 29b35d21..5bd69f58 100644
--- a/LEGO1/lego/legoomni/src/build/legocarbuildpresenter.cpp
+++ b/LEGO1/lego/legoomni/src/build/legocarbuildpresenter.cpp
@@ -1,7 +1,13 @@
 #include "legocarbuildpresenter.h"
 
+#include "3dmanager/lego3dmanager.h"
 #include "legoentity.h"
+#include "legogamestate.h"
+#include "legoutils.h"
+#include "legovideomanager.h"
+#include "misc.h"
 #include "mxautolock.h"
+#include "realtime/realtime.h"
 
 DECOMP_SIZE_ASSERT(LegoCarBuildAnimPresenter::UnknownListEntry, 0x0c)
 DECOMP_SIZE_ASSERT(LegoCarBuildAnimPresenter, 0x150)
@@ -23,7 +29,7 @@ LegoCarBuildAnimPresenter::LegoCarBuildAnimPresenter()
 	m_unk0x140 = NULL;
 	m_unk0x144 = -1;
 	m_unk0x148 = -1;
-	m_unk0x14c = NULL;
+	m_mainSourceId = NULL;
 }
 
 // FUNCTION: LEGO1 0x10078500
@@ -47,8 +53,8 @@ LegoCarBuildAnimPresenter::~LegoCarBuildAnimPresenter()
 	m_unk0xc8.GetRoot()->SetNumChildren(0);
 	*m_unk0xc8.GetRoot()->GetChildren() = NULL;
 
-	if (m_unk0x14c) {
-		delete m_unk0x14c;
+	if (m_mainSourceId) {
+		delete[] m_mainSourceId;
 	}
 }
 
@@ -65,11 +71,103 @@ void LegoCarBuildAnimPresenter::ReadyTickle()
 	// TODO
 }
 
-// STUB: LEGO1 0x100789e0
-// STUB: BETA10 0x10070cdd
+// FUNCTION: LEGO1 0x100789e0
+// FUNCTION: BETA10 0x10070cdd
 void LegoCarBuildAnimPresenter::StreamingTickle()
 {
-	// TODO
+	if (!m_unk0x140->GetROI()) {
+		return;
+	}
+
+	m_mainSourceId = new LegoChar[strlen(m_action->GetAtomId().GetInternal()) + 1];
+	assert(m_mainSourceId);
+
+	strcpy(m_mainSourceId, m_action->GetAtomId().GetInternal());
+	m_mainSourceId[strlen(m_mainSourceId) - 1] = 'M';
+
+	FUN_10079160();
+
+	if (GameState()->GetCurrentAct() == LegoGameState::e_act2) {
+		m_unk0xc0 = 10;
+	}
+
+	MxS16 i;
+
+	for (i = 0; i < m_unk0xbe; i++) {
+		if (m_unk0xc0 == i) {
+			FUN_10079680(m_unk0x128[i].m_unk0x04);
+		}
+		else {
+			FUN_100795d0(m_unk0x128[i].m_unk0x04);
+		}
+
+		if (i < m_unk0xc0) {
+			FUN_10079050(i);
+			FUN_10079680(m_unk0x128[i].m_unk0x00);
+		}
+
+		LegoChar* name = m_unk0x128[i].m_unk0x04;
+
+		if (name) {
+			for (MxS32 j = 0; j <= m_roiMapSize; j++) {
+				LegoROI* roi = m_roiMap[j];
+
+				if (roi && roi->GetName() && (strcmpi(name, roi->GetName()) == 0)) {
+					roi->FUN_100a9dd0();
+					roi->FUN_100a9350("lego red");
+				}
+			}
+		}
+	}
+
+	LegoVideoManager* videoManager = VideoManager();
+	assert(videoManager); // verifies variable name 'videoManager'
+
+	Lego3DView* lego3dview = videoManager->Get3DManager()->GetLego3DView();
+	LegoROI* videoManagerROI = videoManager->GetViewROI();
+	LegoROI* local60 = m_unk0x140->GetROI();
+	LegoROI* camera = NULL;
+	MxFloat fov;
+
+	MxS16 totalNodes = CountTotalTreeNodes(m_anim->GetRoot());
+
+	for (i = 0; i < totalNodes; i++) {
+		LegoAnimNodeData* animNodeData = (LegoAnimNodeData*) GetTreeNode(m_anim->GetRoot(), i)->GetData();
+
+		if (strnicmp(animNodeData->GetName(), "CAM", strlen("CAM")) == 0) {
+			camera = local60->FindChildROI(animNodeData->GetName(), local60);
+			fov = atof(&animNodeData->GetName()[strlen(animNodeData->GetName()) - 2]);
+			break;
+		}
+	}
+
+	assert(camera); // verifies variable name 'camera'
+
+	LegoROI* targetROI = local60->FindChildROI("TARGET", local60);
+
+	Mx3DPointFloat dirVec;
+
+	Vector3 cameraPosition(camera->GetWorldPosition());
+	Vector3 upVec(camera->GetWorldUp());
+	Vector3 targetPosition(targetROI->GetWorldPosition());
+
+	MxMatrix localTransform;
+
+	dirVec[0] = targetPosition[0] - cameraPosition[0];
+	dirVec[1] = targetPosition[1] - cameraPosition[1];
+	dirVec[2] = targetPosition[2] - cameraPosition[2];
+	dirVec.Unitize();
+
+	CalcLocalTransform(cameraPosition, dirVec, upVec, localTransform);
+
+	videoManagerROI->WrappedSetLocalTransform(localTransform);
+	lego3dview->Moved(*videoManagerROI);
+	videoManager->Get3DManager()->SetFrustrum(fov, 0.1, 250.0);
+
+	m_unk0xe0 = local60->FindChildROI("VIEW", local60)->GetLocal2World();
+
+	m_previousTickleStates |= 1 << m_currentTickleState;
+	m_currentTickleState = e_repeating;
 }
 
 // FUNCTION: LEGO1 0x10078db0
@@ -83,13 +181,43 @@ void LegoCarBuildAnimPresenter::EndAction()
 	}
 }
 
+// FUNCTION: LEGO1 0x10079050
+// FUNCTION: BETA10 0x1007151e
+void LegoCarBuildAnimPresenter::FUN_10079050(MxS16 p_index)
+{
+	FUN_10079090(m_unk0x128[p_index].m_unk0x04, m_unk0x128[p_index].m_unk0x00);
+	FUN_100795d0(m_unk0x128[p_index].m_unk0x04);
+}
+
+// STUB: LEGO1 0x10079090
+// STUB: BETA10 0x10071584
+void LegoCarBuildAnimPresenter::FUN_10079090(LegoChar* p_param1, LegoChar* p_param2)
+{
+	// TODO
+}
+
 // STUB: LEGO1 0x10079160
+// STUB: BETA10 0x1007165d
 void LegoCarBuildAnimPresenter::FUN_10079160()
 {
 	// called from LegoCarBuildAnimPresenter::StreamingTickle()
 	// TODO
 }
 
+// STUB: LEGO1 0x100795d0
+// STUB: BETA10 0x10071d96
+void LegoCarBuildAnimPresenter::FUN_100795d0(LegoChar* p_param)
+{
+	// TODO
+}
+
+// STUB: LEGO1 0x10079680
+// STUB: BETA10 0x10071ec5
+void LegoCarBuildAnimPresenter::FUN_10079680(LegoChar* p_param)
+{
+	// TODO
+}
+
 // FUNCTION: LEGO1 0x10079920
 // FUNCTION: BETA10 0x1007225d
 void LegoCarBuildAnimPresenter::RotateAroundYAxis(MxFloat p_angle)
diff --git a/LEGO1/lego/legoomni/src/common/legoutils.cpp b/LEGO1/lego/legoomni/src/common/legoutils.cpp
index 266ac1b1..d90e655e 100644
--- a/LEGO1/lego/legoomni/src/common/legoutils.cpp
+++ b/LEGO1/lego/legoomni/src/common/legoutils.cpp
@@ -106,6 +106,7 @@ MxBool TransformWorldToScreen(const MxFloat p_world[3], MxFloat p_screen[4])
 }
 
 // FUNCTION: LEGO1 0x1003df90
+// FUNCTION: BETA10 0x100d39a3
 MxS16 CountTotalTreeNodes(LegoTreeNode* p_node)
 {
 	MxS16 result = 1;
@@ -118,6 +119,7 @@ MxS16 CountTotalTreeNodes(LegoTreeNode* p_node)
 }
 
 // FUNCTION: LEGO1 0x1003dfd0
+// FUNCTION: BETA10 0x100d3a09
 LegoTreeNode* GetTreeNode(LegoTreeNode* p_node, MxU32 p_index)
 {
 	LegoTreeNode* result = NULL;
diff --git a/LEGO1/lego/legoomni/src/entity/legoentity.cpp b/LEGO1/lego/legoomni/src/entity/legoentity.cpp
index f59c83a9..81cb3fe3 100644
--- a/LEGO1/lego/legoomni/src/entity/legoentity.cpp
+++ b/LEGO1/lego/legoomni/src/entity/legoentity.cpp
@@ -213,6 +213,7 @@ Mx3DPointFloat LegoEntity::GetWorldUp()
 }
 
 // FUNCTION: LEGO1 0x10010d80
+// FUNCTION: BETA10 0x1007ebbe
 Mx3DPointFloat LegoEntity::GetWorldPosition()
 {
 	if (m_roi != NULL) {
diff --git a/LEGO1/lego/legoomni/src/entity/legoworld.cpp b/LEGO1/lego/legoomni/src/entity/legoworld.cpp
index eafc5e1e..822121e6 100644
--- a/LEGO1/lego/legoomni/src/entity/legoworld.cpp
+++ b/LEGO1/lego/legoomni/src/entity/legoworld.cpp
@@ -380,6 +380,7 @@ void LegoWorld::AddPath(LegoPathController* p_controller)
 }
 
 // FUNCTION: LEGO1 0x10020020
+// FUNCTION: BETA10 0x100da77c
 LegoPathBoundary* LegoWorld::FindPathBoundary(const char* p_name)
 {
 	LegoPathControllerListCursor cursor(&m_list0x68);
diff --git a/LEGO1/lego/sources/3dmanager/lego3dmanager.cpp b/LEGO1/lego/sources/3dmanager/lego3dmanager.cpp
index 1781870a..750f54c6 100644
--- a/LEGO1/lego/sources/3dmanager/lego3dmanager.cpp
+++ b/LEGO1/lego/sources/3dmanager/lego3dmanager.cpp
@@ -97,6 +97,7 @@ double Lego3DManager::Render(double p_und)
 }
 
 // FUNCTION: LEGO1 0x100ab4d0
+// FUNCTION: BETA10 0x1017baeb
 int Lego3DManager::SetFrustrum(float p_fov, float p_front, float p_back)
 {
 	m_pLego3DView->GetView()->SetFrustrum(p_front, p_back, p_fov);
diff --git a/LEGO1/lego/sources/3dmanager/lego3dview.cpp b/LEGO1/lego/sources/3dmanager/lego3dview.cpp
index e895e378..4f69fa40 100644
--- a/LEGO1/lego/sources/3dmanager/lego3dview.cpp
+++ b/LEGO1/lego/sources/3dmanager/lego3dview.cpp
@@ -119,6 +119,7 @@ BOOL Lego3DView::SetPointOfView(ViewROI& rROI)
 }
 
 // FUNCTION: LEGO1 0x100ab210
+// FUNCTION: BETA10 0x1017d230
 BOOL Lego3DView::Moved(ViewROI& rROI)
 {
 	assert(m_pViewManager);
diff --git a/LEGO1/lego/sources/anim/legoanim.h b/LEGO1/lego/sources/anim/legoanim.h
index 0badeae9..62816ba9 100644
--- a/LEGO1/lego/sources/anim/legoanim.h
+++ b/LEGO1/lego/sources/anim/legoanim.h
@@ -148,7 +148,9 @@ class LegoAnimNodeData : public LegoTreeNodeData {
 	LegoResult CreateLocalTransform(LegoFloat p_time, Matrix4& p_matrix);
 	LegoBool FUN_100a0990(LegoFloat p_time);
 
+	// FUNCTION: BETA10 0x100595d0
 	const LegoChar* GetName() { return m_name; }
+
 	LegoU32 GetTranslationIndex() { return m_translationIndex; }
 	LegoU32 GetRotationIndex() { return m_rotationIndex; }
 	LegoU32 GetScaleIndex() { return m_scaleIndex; }
@@ -164,6 +166,8 @@ class LegoAnimNodeData : public LegoTreeNodeData {
 	void SetScaleIndex(LegoU32 p_scaleIndex) { m_scaleIndex = p_scaleIndex; }
 	void SetMorphIndex(LegoU32 p_morphIndex) { m_morphIndex = p_morphIndex; }
 	void SetUnknown0x20(LegoU16 p_unk0x20) { m_unk0x20 = p_unk0x20; }
+
+	// FUNCTION: BETA10 0x1005f2e0
 	void SetUnknown0x22(LegoU16 p_unk0x22) { m_unk0x22 = p_unk0x22; }
 
 	LegoResult CreateLocalTransform(LegoTime p_time, Matrix4& p_matrix)
diff --git a/LEGO1/lego/sources/misc/legotree.h b/LEGO1/lego/sources/misc/legotree.h
index fb97a612..fea8d5ec 100644
--- a/LEGO1/lego/sources/misc/legotree.h
+++ b/LEGO1/lego/sources/misc/legotree.h
@@ -32,14 +32,21 @@ class LegoTreeNode {
 public:
 	LegoTreeNode();
 	virtual ~LegoTreeNode();
+
+	// FUNCTION: BETA10 0x100595a0
 	LegoTreeNodeData* GetData() { return m_data; }
+
 	void SetData(LegoTreeNodeData* p_data) { m_data = p_data; }
+
+	// FUNCTION: BETA10 0x10012150
 	LegoU32 GetNumChildren() { return m_numChildren; }
 
 	// FUNCTION: BETA10 0x10073370
 	void SetNumChildren(LegoU32 p_numChildren) { m_numChildren = p_numChildren; }
 
+	// FUNCTION: BETA10 0x10012180
 	LegoTreeNode* GetChild(LegoU32 p_i) { return m_children[p_i]; }
+
 	void SetChild(LegoU32 p_i, LegoTreeNode* p_child) { m_children[p_i] = p_child; }
 
 	// FUNCTION: BETA10 0x100733a0
diff --git a/LEGO1/lego/sources/roi/legoroi.cpp b/LEGO1/lego/sources/roi/legoroi.cpp
index a11436f3..94fed7c6 100644
--- a/LEGO1/lego/sources/roi/legoroi.cpp
+++ b/LEGO1/lego/sources/roi/legoroi.cpp
@@ -341,6 +341,7 @@ LegoResult LegoROI::FUN_100a8cb0(LegoAnimNodeData* p_data, LegoTime p_time, Matr
 }
 
 // FUNCTION: LEGO1 0x100a8ce0
+// FUNCTION: BETA10 0x1018a815
 LegoROI* LegoROI::FindChildROI(const LegoChar* p_name, LegoROI* p_roi)
 {
 	CompoundObject::iterator it;
@@ -551,6 +552,18 @@ LegoResult LegoROI::GetTexture(LegoTextureInfo*& p_textureInfo)
 	return FAILURE;
 }
 
+// FUNCTION: LEGO1 0x100a9350
+// FUNCTION: BETA10 0x1018b25c
+LegoResult LegoROI::FUN_100a9350(const LegoChar* p_color)
+{
+	MxFloat red, green, blue, alpha;
+	if (ColorAliasLookup(p_color, red, green, blue, alpha)) {
+		return FUN_100a9170(red, green, blue, alpha);
+	}
+
+	return SUCCESS;
+}
+
 // FUNCTION: LEGO1 0x100a9410
 // FUNCTION: BETA10 0x1018b324
 LegoU32 LegoROI::FUN_100a9410(
@@ -778,6 +791,13 @@ void LegoROI::SetName(const LegoChar* p_name)
 	}
 }
 
+// STUB: LEGO1 0x100a9dd0
+// STUB: BETA10 0x1018bfdb
+void LegoROI::FUN_100a9dd0()
+{
+	// TODO
+}
+
 // FUNCTION: LEGO1 0x100a9e10
 void LegoROI::SetDisplayBB(int p_displayBB)
 {
diff --git a/LEGO1/lego/sources/roi/legoroi.h b/LEGO1/lego/sources/roi/legoroi.h
index fb96b2a5..babb566a 100644
--- a/LEGO1/lego/sources/roi/legoroi.h
+++ b/LEGO1/lego/sources/roi/legoroi.h
@@ -38,12 +38,14 @@ class LegoROI : public ViewROI {
 	LegoResult FUN_100a9170(LegoFloat p_red, LegoFloat p_green, LegoFloat p_blue, LegoFloat p_alpha);
 	LegoResult FUN_100a9210(LegoTextureInfo* p_textureInfo);
 	LegoResult GetTexture(LegoTextureInfo*& p_textureInfo);
+	LegoResult FUN_100a9350(const LegoChar* p_color);
 	LegoU32 FUN_100a9410(Vector3& p_v1, Vector3& p_v2, float p_f1, float p_f2, Vector3& p_v3, LegoBool p_collideBox);
 	void SetName(const LegoChar* p_name);
 
 	float IntrinsicImportance() const override; // vtable+0x04
 	void UpdateWorldBoundingVolumes() override; // vtable+0x18
 
+	void FUN_100a9dd0();
 	void SetDisplayBB(int p_displayBB);
 
 	static LegoResult FUN_100a8cb0(LegoAnimNodeData* p_data, LegoTime p_time, Matrix4& p_matrix);
diff --git a/LEGO1/library_msvc.h b/LEGO1/library_msvc.h
index 5df6786c..b9a1359c 100644
--- a/LEGO1/library_msvc.h
+++ b/LEGO1/library_msvc.h
@@ -482,6 +482,7 @@
 // __setmode_lk
 
 // LIBRARY: LEGO1 0x100d1ed0
+// LIBRARY: BETA10 0x1018ec70
 // _strnicmp
 
 // LIBRARY: LEGO1 0x100d1fd0
@@ -682,6 +683,9 @@
 // LIBRARY: BETA10 0x100f9780
 // strlen
 
+// LIBRARY: BETA10 0x100fa200
+// strcpy
+
 // LIBRARY: BETA10 0x100f8a88
 // operator new
 
@@ -703,6 +707,9 @@
 // LIBRARY: BETA10 0x100fe5a0
 // abort
 
+// LIBRARY: BETA10 0x100fa0e0
+// atof
+
 // LIBRARY: BETA10 0x100ff82b
 // __ctrandisp1
 
diff --git a/LEGO1/mxgeometry/mxgeometry3d.h b/LEGO1/mxgeometry/mxgeometry3d.h
index f73d5d8a..f09ea244 100644
--- a/LEGO1/mxgeometry/mxgeometry3d.h
+++ b/LEGO1/mxgeometry/mxgeometry3d.h
@@ -6,10 +6,15 @@
 #include "realtime/vector.h"
 
 // VTABLE: LEGO1 0x100d4488
+// VTABLE: BETA10 0x101b84d0
 // SIZE 0x14
 class Mx3DPointFloat : public Vector3 {
 public:
+	// FUNCTION: LEGO1 0x1001d170
+	// FUNCTION: BETA10 0x10011990
 	Mx3DPointFloat() : Vector3(m_elements) {}
+
+	// FUNCTION: BETA10 0x10011870
 	Mx3DPointFloat(float p_x, float p_y, float p_z) : Vector3(m_elements)
 	{
 		m_elements[0] = p_x;
@@ -24,9 +29,6 @@ class Mx3DPointFloat : public Vector3 {
 	// FUNCTION: BETA10 0x100151e0
 	Mx3DPointFloat(const Vector3& p_other) : Vector3(m_elements) { EqualsImpl(p_other.m_data); }
 
-	// SYNTHETIC: LEGO1 0x1001d170
-	// Mx3DPointFloat::Mx3DPointFloat
-
 	// FUNCTION: LEGO1 0x10003c10
 	virtual void operator=(const Vector3& p_impl) { EqualsImpl(p_impl.m_data); } // vtable+0x88
 
@@ -34,7 +36,9 @@ class Mx3DPointFloat : public Vector3 {
 	float GetY() { return m_data[1]; }
 	float GetZ() { return m_data[2]; }
 
+	// FUNCTION: BETA10 0x10013460
 	float& operator[](int idx) { return m_data[idx]; }
+
 	const float& operator[](int idx) const { return m_data[idx]; }
 
 	// SYNTHETIC: LEGO1 0x10010c00
diff --git a/LEGO1/omni/include/mxdsobject.h b/LEGO1/omni/include/mxdsobject.h
index 3bb0a3ff..eb80044b 100644
--- a/LEGO1/omni/include/mxdsobject.h
+++ b/LEGO1/omni/include/mxdsobject.h
@@ -69,7 +69,9 @@ class MxDSObject : public MxCore {
 	// FUNCTION: BETA10 0x10017910
 	MxU32 GetObjectId() { return m_objectId; }
 
+	// FUNCTION: BETA10 0x10017940
 	const MxAtomId& GetAtomId() { return m_atomId; }
+
 	MxS16 GetUnknown24() { return m_unk0x24; }
 	MxPresenter* GetUnknown28() { return m_unk0x28; }
 
diff --git a/LEGO1/realtime/matrix.h b/LEGO1/realtime/matrix.h
index 181acedf..8f9f63fe 100644
--- a/LEGO1/realtime/matrix.h
+++ b/LEGO1/realtime/matrix.h
@@ -183,6 +183,7 @@ class Matrix4 {
 };
 
 // FUNCTION: LEGO1 0x10002550
+// FUNCTION: BETA10 0x100101c0
 inline void Matrix4::ToQuaternion(Vector4& p_outQuat)
 {
 	float trace = m_data[0][0] + m_data[1][1] + m_data[2][2];
@@ -223,6 +224,7 @@ inline void Matrix4::ToQuaternion(Vector4& p_outQuat)
 }
 
 // FUNCTION: LEGO1 0x10002710
+// FUNCTION: BETA10 0x10010550
 inline int Matrix4::FromQuaternion(const Vector4& p_vec)
 {
 	float len = p_vec.LenSquared();
diff --git a/LEGO1/realtime/orientableroi.h b/LEGO1/realtime/orientableroi.h
index 61b61645..5e70aa5e 100644
--- a/LEGO1/realtime/orientableroi.h
+++ b/LEGO1/realtime/orientableroi.h
@@ -48,7 +48,9 @@ class OrientableROI : public ROI {
 	// FUNCTION: BETA10 0x10011780
 	const float* GetWorldDirection() const { return m_local2world[2]; }
 
+	// FUNCTION: BETA10 0x1004aa70
 	const float* GetWorldUp() const { return m_local2world[1]; }
+
 	OrientableROI* GetParentROI() const { return m_parentROI; }
 
 	void SetParentROI(OrientableROI* p_parentROI) { m_parentROI = p_parentROI; }
diff --git a/LEGO1/realtime/realtime.cpp b/LEGO1/realtime/realtime.cpp
index 829b2271..944b093c 100644
--- a/LEGO1/realtime/realtime.cpp
+++ b/LEGO1/realtime/realtime.cpp
@@ -3,6 +3,7 @@
 #include <vec.h>
 
 // FUNCTION: LEGO1 0x100a5b40
+// FUNCTION: BETA10 0x10168127
 void CalcLocalTransform(const Vector3& p_posVec, const Vector3& p_dirVec, const Vector3& p_upVec, Matrix4& p_outMatrix)
 {
 	float x_axis[3], y_axis[3], z_axis[3];
diff --git a/LEGO1/realtime/vector.h b/LEGO1/realtime/vector.h
index 3faa559e..6d0803b9 100644
--- a/LEGO1/realtime/vector.h
+++ b/LEGO1/realtime/vector.h
@@ -163,13 +163,18 @@ class Vector2 {
 		return *this;
 	}
 
-	// SYNTHETIC: BETA10 0x10013460
-	// Vector3::operator[]
-
-	// FUNCTION: BETA10 0x10010890
-	float& operator[](int idx) { return m_data[idx]; }
+	// There is another candidate for `Vector2::operator[]` at BETA10 0x10010890, which is called from only three
+	// functions in BETA10:
+	// - `Matrix4::FromQuaternion()`
+	// - `Matrix4::ToQuaternion()`
+	// - `UnknownMx4DPointFloat::FUN_100040a0()`
+	// Maybe there is another subclass of `Vector4` involved that has the same VTABLE but a different `operator[]`.
+	// It is also interesting that `Matrix4::operator[]` is located right above at BETA10 0x10010860.
 
 	// FUNCTION: BETA10 0x1001d140
+	float& operator[](int idx) { return m_data[idx]; }
+
+	// FUNCTION: BETA10 0x1001d170
 	const float& operator[](int idx) const { return m_data[idx]; }
 
 protected:
@@ -189,6 +194,8 @@ class Vector3 : public Vector2 {
 	// Example: LegoCameraController::GetWorldUp
 	// Vector3 however is a class that can mutate its underlying source, making
 	// initialization with a const source fundamentally incompatible.
+
+	// FUNCTION: BETA10 0x100109a0
 	Vector3(const float* p_data) : Vector2((float*) p_data) {}
 
 	// Note: virtual function overloads appear in the virtual table