diff --git a/LEGO1/lego/sources/anim/legoanim.cpp b/LEGO1/lego/sources/anim/legoanim.cpp
index 3b8caafc..dc3c21da 100644
--- a/LEGO1/lego/sources/anim/legoanim.cpp
+++ b/LEGO1/lego/sources/anim/legoanim.cpp
@@ -725,6 +725,7 @@ void LegoAnimNodeData::SetName(LegoChar* p_name)
 }
 
 // FUNCTION: LEGO1 0x100a03c0
+// FUNCTION: BETA10 0x1017f254
 LegoResult LegoAnimNodeData::CreateLocalTransform(LegoFloat p_time, Matrix4& p_matrix)
 {
 	LegoU32 index;
diff --git a/LEGO1/lego/sources/roi/legoroi.cpp b/LEGO1/lego/sources/roi/legoroi.cpp
index dd72f7f0..97baaadf 100644
--- a/LEGO1/lego/sources/roi/legoroi.cpp
+++ b/LEGO1/lego/sources/roi/legoroi.cpp
@@ -58,8 +58,12 @@ ColorOverride g_colorOverride = NULL;
 TextureHandler g_textureHandler = NULL;
 
 // FUNCTION: LEGO1 0x100a81b0
-void LegoROI::FUN_100a81b0(const LegoChar* p_error, const LegoChar* p_name)
+// FUNCTION: BETA10 0x101898c0
+// FUNCTION: ALPHA 0x100bb1c0
+void LegoROI::FUN_100a81b0(const LegoChar* p_error, ...)
 {
+	// Probably a printf-like debug function that was removed early.
+	// No known implementation in any of the binaries.
 }
 
 // FUNCTION: LEGO1 0x100a81c0
@@ -69,6 +73,7 @@ void LegoROI::configureLegoROI(int p_roiConfig)
 }
 
 // FUNCTION: LEGO1 0x100a81d0
+// FUNCTION: BETA10 0x101898e8
 LegoROI::LegoROI(Tgl::Renderer* p_renderer) : ViewROI(p_renderer, NULL)
 {
 	m_parentROI = NULL;
@@ -77,6 +82,7 @@ LegoROI::LegoROI(Tgl::Renderer* p_renderer) : ViewROI(p_renderer, NULL)
 }
 
 // FUNCTION: LEGO1 0x100a82d0
+// FUNCTION: BETA10 0x10189994
 LegoROI::LegoROI(Tgl::Renderer* p_renderer, ViewLODList* p_lodList) : ViewROI(p_renderer, p_lodList)
 {
 	m_parentROI = NULL;
@@ -85,6 +91,7 @@ LegoROI::LegoROI(Tgl::Renderer* p_renderer, ViewLODList* p_lodList) : ViewROI(p_
 }
 
 // FUNCTION: LEGO1 0x100a83c0
+// FUNCTION: BETA10 0x10189a42
 LegoROI::~LegoROI()
 {
 	if (comp) {
@@ -105,6 +112,7 @@ LegoROI::~LegoROI()
 }
 
 // FUNCTION: LEGO1 0x100a84a0
+// FUNCTION: BETA10 0x10189b99
 LegoResult LegoROI::Read(
 	OrientableROI* p_unk0xd4,
 	Tgl::Renderer* p_renderer,
@@ -337,6 +345,7 @@ done:
 }
 
 // FUNCTION: LEGO1 0x100a8cb0
+// FUNCTION: BETA10 0x1018a7e8
 LegoResult LegoROI::CreateLocalTransform(LegoAnimNodeData* p_data, LegoTime p_time, Matrix4& p_matrix)
 {
 	p_matrix.SetIdentity();
@@ -379,6 +388,7 @@ LegoROI* LegoROI::FindChildROI(const LegoChar* p_name, LegoROI* p_roi)
 }
 
 // FUNCTION: LEGO1 0x100a8da0
+// FUNCTION: BETA10 0x1018a9fb
 LegoResult LegoROI::ApplyAnimationTransformation(
 	LegoTreeNode* p_node,
 	const Matrix4& p_matrix,
@@ -473,6 +483,7 @@ void LegoROI::FUN_100a8fd0(LegoTreeNode* p_node, Matrix4& p_matrix, LegoTime p_t
 }
 
 // FUNCTION: LEGO1 0x100a90f0
+// FUNCTION: BETA10 0x1018ada8
 LegoResult LegoROI::SetFrame(LegoAnim* p_anim, LegoTime p_time)
 {
 	LegoTreeNode* root = p_anim->GetRoot();
@@ -512,6 +523,7 @@ LegoResult LegoROI::SetLodColor(LegoFloat p_red, LegoFloat p_green, LegoFloat p_
 }
 
 // FUNCTION: LEGO1 0x100a9210
+// FUNCTION: BETA10 0x1018af25
 LegoResult LegoROI::SetTextureInfo(LegoTextureInfo* p_textureInfo)
 {
 	LegoResult result = SUCCESS;
@@ -735,6 +747,7 @@ LegoU32 LegoROI::FUN_100a9410(
 }
 
 // FUNCTION: LEGO1 0x100a9a50
+// FUNCTION: BETA10 0x1018bb6b
 TimeROI::TimeROI(Tgl::Renderer* p_renderer, ViewLODList* p_lodList, LegoTime p_time) : LegoROI(p_renderer, p_lodList)
 {
 	m_time = p_time;
@@ -760,6 +773,7 @@ void TimeROI::FUN_100a9b40(Matrix4& p_matrix, LegoTime p_time)
 }
 
 // FUNCTION: LEGO1 0x100a9bf0
+// FUNCTION: BETA10 0x1018bc93
 LegoBool LegoROI::GetRGBAColor(const LegoChar* p_name, float& p_red, float& p_green, float& p_blue, float& p_alpha)
 {
 	if (p_name == NULL) {
@@ -850,12 +864,14 @@ void LegoROI::SetDisplayBB(int p_displayBB)
 }
 
 // FUNCTION: LEGO1 0x100aa340
+// FUNCTION: BETA10 0x1018cca0
 float LegoROI::IntrinsicImportance() const
 {
 	return .5;
 }
 
 // FUNCTION: LEGO1 0x100aa350
+// FUNCTION: BETA10 0x1018ccc0
 void LegoROI::UpdateWorldBoundingVolumes()
 {
 	CalcWorldBoundingVolumes(m_sphere, m_local2world, m_world_bounding_box, m_world_bounding_sphere);
diff --git a/LEGO1/lego/sources/roi/legoroi.h b/LEGO1/lego/sources/roi/legoroi.h
index 28119c72..216bb68d 100644
--- a/LEGO1/lego/sources/roi/legoroi.h
+++ b/LEGO1/lego/sources/roi/legoroi.h
@@ -17,6 +17,7 @@ class LegoTreeNode;
 struct LegoAnimActorEntry;
 
 // VTABLE: LEGO1 0x100dbe38
+// VTABLE: BETA10 0x101c3898
 // SIZE 0x108
 class LegoROI : public ViewROI {
 public:
@@ -57,7 +58,7 @@ public:
 	void SetDisplayBB(int p_displayBB);
 
 	static LegoResult CreateLocalTransform(LegoAnimNodeData* p_data, LegoTime p_time, Matrix4& p_matrix);
-	static void FUN_100a81b0(const LegoChar* p_error, const LegoChar* p_name);
+	static void FUN_100a81b0(const LegoChar* p_error, ...);
 	static void configureLegoROI(int p_roi);
 	static void SetColorOverride(ColorOverride p_colorOverride);
 	static LegoBool GetRGBAColor(const LegoChar* p_name, float& p_red, float& p_green, float& p_blue, float& p_alpha);
@@ -86,6 +87,7 @@ public:
 	void SetBoundingBox(const BoundingBox& p_box) { m_bounding_box = p_box; }
 
 	// SYNTHETIC: LEGO1 0x100a82b0
+	// SYNTHETIC: BETA10 0x1018c490
 	// LegoROI::`scalar deleting destructor'
 
 private:
@@ -96,15 +98,20 @@ private:
 };
 
 // VTABLE: LEGO1 0x100dbea8
+// VTABLE: BETA10 0x101c38d0
 // SIZE 0x10c
 class TimeROI : public LegoROI {
 public:
 	TimeROI(Tgl::Renderer* p_renderer, ViewLODList* p_lodList, LegoTime p_time);
 
+	void FUN_100a9b40(Matrix4& p_matrix, LegoTime p_time);
+
 	// SYNTHETIC: LEGO1 0x100a9ad0
+	// SYNTHETIC: BETA10 0x1018c540
 	// TimeROI::`scalar deleting destructor'
 
-	void FUN_100a9b40(Matrix4& p_matrix, LegoTime p_time);
+	// SYNTHETIC: BETA10 0x1018c580
+	// TimeROI::~TimeROI
 
 private:
 	LegoTime m_time; // 0x108
diff --git a/LEGO1/realtime/orientableroi.cpp b/LEGO1/realtime/orientableroi.cpp
index f479ca7d..92c9ac9e 100644
--- a/LEGO1/realtime/orientableroi.cpp
+++ b/LEGO1/realtime/orientableroi.cpp
@@ -108,6 +108,7 @@ void OrientableROI::SetLocal2World(const Matrix4& p_local2world)
 }
 
 // FUNCTION: LEGO1 0x100a5910
+// FUNCTION: BETA10 0x10167bac
 void OrientableROI::UpdateWorldData()
 {
 	UpdateWorldBoundingVolumes();
@@ -115,6 +116,7 @@ void OrientableROI::UpdateWorldData()
 }
 
 // FUNCTION: LEGO1 0x100a5930
+// FUNCTION: BETA10 0x10167bd8
 void OrientableROI::SetLocal2WorldWithWorldDataUpdate(const Matrix4& p_transform)
 {
 	m_local2world = p_transform;
@@ -123,6 +125,7 @@ void OrientableROI::SetLocal2WorldWithWorldDataUpdate(const Matrix4& p_transform
 }
 
 // FUNCTION: LEGO1 0x100a5960
+// FUNCTION: BETA10 0x10167c19
 void OrientableROI::UpdateWorldDataWithTransform(const Matrix4& p_transform)
 {
 	MxMatrix l_matrix(m_local2world);
@@ -132,6 +135,7 @@ void OrientableROI::UpdateWorldDataWithTransform(const Matrix4& p_transform)
 }
 
 // FUNCTION: LEGO1 0x100a59b0
+// FUNCTION: BETA10 0x10167c6d
 void OrientableROI::UpdateWorldDataWithTransformAndChildren(const Matrix4& p_transform)
 {
 	MxMatrix l_matrix(m_local2world);
@@ -155,11 +159,13 @@ void OrientableROI::SetWorldVelocity(const Vector3& p_world_velocity)
 }
 
 // FUNCTION: LEGO1 0x100a5a50
+// FUNCTION: BETA10 0x10167d65
 void OrientableROI::UpdateWorldVelocity()
 {
 }
 
 // FUNCTION: LEGO1 0x100a5a60
+// FUNCTION: BETA10 0x10167d7b
 void CalcWorldBoundingVolumes(
 	const BoundingSphere& modelling_sphere,
 	const Matrix4& local2world,
@@ -186,18 +192,21 @@ void CalcWorldBoundingVolumes(
 }
 
 // FUNCTION: LEGO1 0x100a5d80
+// FUNCTION: BETA10 0x10168760
 const float* OrientableROI::GetWorldVelocity() const
 {
 	return m_world_velocity.GetData();
 }
 
 // FUNCTION: LEGO1 0x100a5d90
+// FUNCTION: BETA10 0x10168790
 const BoundingBox& OrientableROI::GetWorldBoundingBox() const
 {
 	return m_world_bounding_box;
 }
 
 // FUNCTION: LEGO1 0x100a5da0
+// FUNCTION: BETA10 0x101687b0
 const BoundingSphere& OrientableROI::GetWorldBoundingSphere() const
 {
 	return m_world_bounding_sphere;
diff --git a/LEGO1/realtime/orientableroi.h b/LEGO1/realtime/orientableroi.h
index 031c5af7..c1354c50 100644
--- a/LEGO1/realtime/orientableroi.h
+++ b/LEGO1/realtime/orientableroi.h
@@ -23,6 +23,7 @@ public:
 	const BoundingSphere& GetWorldBoundingSphere() const override; // vtable+0x10
 
 	// FUNCTION: LEGO1 0x100a5db0
+	// FUNCTION: BETA10 0x101687d0
 	virtual void WrappedUpdateWorldData() { UpdateWorldData(); } // vtable+0x14
 
 	virtual void UpdateWorldBoundingVolumes() = 0;                                    // vtable+0x18
@@ -81,6 +82,7 @@ protected:
 // OrientableROI::`scalar deleting destructor'
 
 // SYNTHETIC: LEGO1 0x100aa2f0
+// SYNTHETIC: BETA10 0x10168600
 // OrientableROI::~OrientableROI
 
 #endif // ORIENTABLEROI_H
diff --git a/LEGO1/realtime/roi.h b/LEGO1/realtime/roi.h
index 87cbe8f1..dd5b9993 100644
--- a/LEGO1/realtime/roi.h
+++ b/LEGO1/realtime/roi.h
@@ -15,9 +15,16 @@
 // SIZE 0x28
 class BoundingBox {
 public:
+	// The BETA10 matches may reference the wrong version
+
+	// FUNCTION: BETA10 0x1004a7a0
 	const Vector3& Min() const { return min; }
+
 	Vector3& Min() { return min; }
+
+	// FUNCTION: BETA10 0x1004a7c0
 	const Vector3& Max() const { return max; }
+
 	Vector3& Max() { return max; }
 
 private:
@@ -31,14 +38,26 @@ private:
 // SIZE 0x18
 class BoundingSphere {
 public:
+	// The BETA10 matches may reference the wrong version
+
+	// FUNCTION: BETA10 0x1001fac0
 	const Vector3& Center() const { return center; }
+
+	// FUNCTION: BETA10 0x100d55a0
 	Vector3& Center() { return center; }
+
+	// FUNCTION: BETA10 0x1001fd30
 	const float& Radius() const { return radius; }
+
+	// FUNCTION: BETA10 0x1001fae0
 	float& Radius() { return radius; }
 
 	// SYNTHETIC: BETA10 0x1001fb90
 	// BoundingSphere::operator=
 
+	// SYNTHETIC: BETA10 0x1001fc50
+	// BoundingSphere::BoundingSphere
+
 private:
 	Mx3DPointFloat center; // 0x00
 	float radius;          // 0x14
@@ -136,6 +155,7 @@ protected:
 // list<ROI *,allocator<ROI *> >::~list<ROI *,allocator<ROI *> >
 
 // SYNTHETIC: LEGO1 0x100a5d50
+// SYNTHETIC: BETA10 0x101686a0
 // ROI::~ROI
 
 #endif // ROI_H
diff --git a/LEGO1/viewmanager/viewroi.cpp b/LEGO1/viewmanager/viewroi.cpp
index 787e9078..05f636b6 100644
--- a/LEGO1/viewmanager/viewroi.cpp
+++ b/LEGO1/viewmanager/viewroi.cpp
@@ -16,65 +16,60 @@ float ViewROI::IntrinsicImportance() const
 } // for now
 
 // FUNCTION: LEGO1 0x100a9ec0
+// FUNCTION: BETA10 0x1018c740
 Tgl::Group* ViewROI::GetGeometry()
 {
 	return geometry;
 }
 
 // FUNCTION: LEGO1 0x100a9ed0
+// FUNCTION: BETA10 0x1018c760
 const Tgl::Group* ViewROI::GetGeometry() const
 {
 	return geometry;
 }
 
 // FUNCTION: LEGO1 0x100a9ee0
+// FUNCTION: BETA10 0x1018c780
 void ViewROI::UpdateWorldDataWithTransformAndChildren(const Matrix4& parent2world)
 {
 	OrientableROI::UpdateWorldDataWithTransformAndChildren(parent2world);
+	SetGeometryTransformation();
+}
 
+// FUNCTION: BETA10 0x1018c7b0
+inline void ViewROI::SetGeometryTransformation()
+{
 	if (geometry) {
 		Tgl::FloatMatrix4 matrix;
 		Matrix4 in(matrix);
 		SETMAT4(in, m_local2world);
-		Tgl::Result result = geometry->SetTransformation(matrix);
-		// assert(Tgl::Succeeded(result));
+		geometry->SetTransformation(matrix);
 	}
 }
 
 // FUNCTION: LEGO1 0x100a9fc0
+// FUNCTION: BETA10 0x1018cad0
 void ViewROI::UpdateWorldDataWithTransform(const Matrix4& p_transform)
 {
 	OrientableROI::UpdateWorldDataWithTransform(p_transform);
-	if (geometry) {
-		Tgl::FloatMatrix4 matrix;
-		Matrix4 in(matrix);
-		SETMAT4(in, m_local2world);
-		geometry->SetTransformation(matrix);
-	}
+	SetGeometryTransformation();
 }
 
 // FUNCTION: LEGO1 0x100aa0a0
+// FUNCTION: BETA10 0x1018cb00
 void ViewROI::SetLocal2WorldWithWorldDataUpdate(const Matrix4& p_transform)
 {
 	OrientableROI::SetLocal2WorldWithWorldDataUpdate(p_transform);
-	if (geometry) {
-		Tgl::FloatMatrix4 matrix;
-		Matrix4 in(matrix);
-		SETMAT4(in, m_local2world);
-		geometry->SetTransformation(matrix);
-	}
+	SetGeometryTransformation();
 }
 
 // FUNCTION: LEGO1 0x100aa180
+// FUNCTION: BETA10 0x1018cb30
 void ViewROI::UpdateWorldData()
 {
 	OrientableROI::UpdateWorldData();
-	if (geometry) {
-		Tgl::FloatMatrix4 matrix;
-		Matrix4 in(matrix);
-		SETMAT4(in, m_local2world);
-		geometry->SetTransformation(matrix);
-	}
+	SetGeometryTransformation();
 }
 
 // FUNCTION: LEGO1 0x100aa500
diff --git a/LEGO1/viewmanager/viewroi.h b/LEGO1/viewmanager/viewroi.h
index 63e82154..b7ba9564 100644
--- a/LEGO1/viewmanager/viewroi.h
+++ b/LEGO1/viewmanager/viewroi.h
@@ -13,6 +13,7 @@
 */
 
 // VTABLE: LEGO1 0x100dbe70
+// VTABLE: BETA10 0x101c3908
 // SIZE 0xe4
 class ViewROI : public OrientableROI {
 public:
@@ -21,6 +22,7 @@ public:
 		c_lodLevelInvisible = -2,
 	};
 
+	// FUNCTION: BETA10 0x1018c5e0
 	ViewROI(Tgl::Renderer* pRenderer, ViewLODList* lodList)
 	{
 		SetLODList(lodList);
@@ -29,6 +31,7 @@ public:
 	}
 
 	// FUNCTION: LEGO1 0x100a9e20
+	// FUNCTION: BETA10 0x1018c680
 	~ViewROI() override
 	{
 		// SetLODList() will decrease refCount of LODList
@@ -36,6 +39,7 @@ public:
 		delete geometry;
 	}
 
+	// FUNCTION: BETA10 0x1007b540
 	void SetLODList(ViewLODList* lodList)
 	{
 		// ??? inherently type unsafe - kind of... because, now, ROI
@@ -69,6 +73,8 @@ public:
 protected:
 	void UpdateWorldDataWithTransformAndChildren(const Matrix4& parent2world) override; // vtable+0x28
 
+	void SetGeometryTransformation();
+
 	Tgl::Group* geometry; // 0xdc
 	int m_lodLevel;       // 0xe0
 };