diff --git a/LEGO1/lego/sources/anim/legoanim.cpp b/LEGO1/lego/sources/anim/legoanim.cpp
index 152bce19..874064ce 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 fd5d3e88..f17a7eaa 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;
@@ -85,6 +90,7 @@ LegoROI::LegoROI(Tgl::Renderer* p_renderer, ViewLODList* p_lodList) : ViewROI(p_
 }
 
 // FUNCTION: LEGO1 0x100a83c0
+// FUNCTION: BETA10 0x10189a42
 LegoROI::~LegoROI()
 {
 	if (comp) {
@@ -105,6 +111,7 @@ LegoROI::~LegoROI()
 }
 
 // FUNCTION: LEGO1 0x100a84a0
+// FUNCTION: BETA10 0x10189b99
 LegoResult LegoROI::Read(
 	OrientableROI* p_unk0xd4,
 	Tgl::Renderer* p_renderer,
@@ -337,6 +344,7 @@ LegoResult LegoROI::Read(
 }
 
 // FUNCTION: LEGO1 0x100a8cb0
+// FUNCTION: BETA10 0x1018a7e8
 LegoResult LegoROI::FUN_100a8cb0(LegoAnimNodeData* p_data, LegoTime p_time, Matrix4& p_matrix)
 {
 	p_matrix.SetIdentity();
@@ -379,6 +387,7 @@ LegoROI* LegoROI::FindChildROI(const LegoChar* p_name, LegoROI* p_roi)
 }
 
 // FUNCTION: LEGO1 0x100a8da0
+// FUNCTION: BETA10 0x1018a9fb
 LegoResult LegoROI::FUN_100a8da0(LegoTreeNode* p_node, const Matrix4& p_matrix, LegoTime p_time, LegoROI* p_roi)
 {
 	MxMatrix mat;
@@ -468,6 +477,7 @@ 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();
@@ -507,6 +517,7 @@ 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;
@@ -755,6 +766,7 @@ 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) {
@@ -845,12 +857,14 @@ 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 f3a76899..03b951d6 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:
@@ -52,7 +53,7 @@ class LegoROI : public ViewROI {
 	void SetDisplayBB(int p_displayBB);
 
 	static LegoResult FUN_100a8cb0(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);
@@ -81,6 +82,7 @@ class LegoROI : public ViewROI {
 	void SetBoundingBox(const BoundingBox& p_box) { m_bounding_box = p_box; }
 
 	// SYNTHETIC: LEGO1 0x100a82b0
+	// SYNTHETIC: BETA10 0x1018c490
 	// LegoROI::`scalar deleting destructor'
 
 private:
diff --git a/LEGO1/realtime/orientableroi.cpp b/LEGO1/realtime/orientableroi.cpp
index f479ca7d..f385e6bd 100644
--- a/LEGO1/realtime/orientableroi.cpp
+++ b/LEGO1/realtime/orientableroi.cpp
@@ -160,6 +160,7 @@ void OrientableROI::UpdateWorldVelocity()
 }
 
 // FUNCTION: LEGO1 0x100a5a60
+// FUNCTION: BETA10 0x10167d7b
 void CalcWorldBoundingVolumes(
 	const BoundingSphere& modelling_sphere,
 	const Matrix4& local2world,