diff --git a/LEGO1/lego/legoomni/include/legopathactor.h b/LEGO1/lego/legoomni/include/legopathactor.h
index df1bb21c..43674fee 100644
--- a/LEGO1/lego/legoomni/include/legopathactor.h
+++ b/LEGO1/lego/legoomni/include/legopathactor.h
@@ -48,7 +48,14 @@ class LegoPathActor : public LegoActor {
 		Vector3& p_point4
 	);                         // vtable+0x80
 	virtual void VTable0x84(); // vtable+0x84
-	virtual void VTable0x88(); // vtable+0x88
+	virtual MxResult VTable0x88(
+		LegoPathBoundary* p_boundary,
+		float p_time,
+		LegoEdge& p_edge1,
+		float p_scale1,
+		LegoEdge& p_edge2,
+		float p_scale2
+	);                         // vtable+0x88
 	virtual void VTable0x8c(); // vtable+0x8c
 
 	// FUNCTION: LEGO1 0x10002d40
@@ -110,7 +117,7 @@ class LegoPathActor : public LegoActor {
 	LegoUnknown m_unk0x8c;            // 0x8c
 	MxU32 m_state;                    // 0xdc
 	LegoEdge* m_destEdge;             // 0xe0
-	undefined4 m_unk0xe4;             // 0xe4
+	MxFloat m_unk0xe4;                // 0xe4
 	undefined m_unk0xe8;              // 0xe8
 	undefined m_unk0xe9;              // 0xe9
 	MxBool m_userNavFlag;             // 0xea
diff --git a/LEGO1/lego/legoomni/include/legopathboundary.h b/LEGO1/lego/legoomni/include/legopathboundary.h
index 763059f5..8a8a5759 100644
--- a/LEGO1/lego/legoomni/include/legopathboundary.h
+++ b/LEGO1/lego/legoomni/include/legopathboundary.h
@@ -6,14 +6,20 @@
 #include "mxstl/stlcompat.h"
 #include "mxtypes.h"
 
-struct LegoPathBoundaryComparator {
-	MxBool operator()(const undefined*, const undefined*) const { return 0; }
+class LegoPathActor;
+
+struct LegoPathActorSetCompare {
+	MxU32 operator()(const LegoPathActor* p_lhs, const LegoPathActor* p_rhs) const
+	{
+		return (MxS32) p_lhs < (MxS32) p_rhs;
+	}
 };
 
 struct LegoAnimPresenterSetCompare {
-	MxBool operator()(const LegoAnimPresenter*, const LegoAnimPresenter*) const { return 0; }
+	MxBool operator()(const LegoAnimPresenter* p_lhs, const LegoAnimPresenter* p_rhs) const { return 0; }
 };
 
+typedef set<LegoPathActor*, LegoPathActorSetCompare> LegoPathActorSet;
 typedef set<LegoAnimPresenter*, LegoAnimPresenterSetCompare> LegoAnimPresenterSet;
 
 // VTABLE: LEGO1 0x100d8618
@@ -22,16 +28,28 @@ class LegoPathBoundary : public LegoWEGEdge {
 public:
 	LegoPathBoundary();
 
-	// STUB: LEGO1 0x10047a80
-	// LegoPathBoundary::`scalar deleting destructor'
+	MxResult AddActor(LegoPathActor* p_actor);
+
 	inline LegoAnimPresenterSet* GetUnknown0x64() { return &m_unk0x64; }
 
+	// STUB: LEGO1 0x10047a80
+	// LegoPathBoundary::`scalar deleting destructor'
+
 private:
-	map<undefined*, undefined*, LegoPathBoundaryComparator> m_unk0x54; // 0x54
-	LegoAnimPresenterSet m_unk0x64;                                    // 0x64
+	LegoPathActorSet m_unk0x54;     // 0x54
+	LegoAnimPresenterSet m_unk0x64; // 0x64
 };
 
 // clang-format off
+// TEMPLATE: LEGO1 0x10045d80
+// _Tree<LegoPathActor *,LegoPathActor *,set<LegoPathActor *,LegoPathActorSetCompare,allocator<LegoPathActor *> >::_Kfn,LegoPathActorSetCompare,allocator<LegoPathActor *> >::iterator::_Dec
+
+// TEMPLATE: LEGO1 0x10045dd0
+// _Tree<LegoPathActor *,LegoPathActor *,set<LegoPathActor *,LegoPathActorSetCompare,allocator<LegoPathActor *> >::_Kfn,LegoPathActorSetCompare,allocator<LegoPathActor *> >::_Insert
+
+// GLOBAL: LEGO1 0x100f11a4
+// _Tree<LegoPathActor *,LegoPathActor *,set<LegoPathActor *,LegoPathActorSetCompare,allocator<LegoPathActor *> >::_Kfn,LegoPathActorSetCompare,allocator<LegoPathActor *> >::_Nil
+
 // GLOBAL: LEGO1 0x100f3200
 // _Tree<LegoAnimPresenter *,LegoAnimPresenter *,set<LegoAnimPresenter *,LegoAnimPresenterSetCompare,allocator<LegoAnimPresenter *> >::_Kfn,LegoAnimPresenterSetCompare,allocator<LegoAnimPresenter *> >::_Nil
 // clang-format on
diff --git a/LEGO1/lego/legoomni/src/paths/legopathactor.cpp b/LEGO1/lego/legoomni/src/paths/legopathactor.cpp
index 48b3ceaf..f061dbed 100644
--- a/LEGO1/lego/legoomni/src/paths/legopathactor.cpp
+++ b/LEGO1/lego/legoomni/src/paths/legopathactor.cpp
@@ -52,10 +52,79 @@ MxResult LegoPathActor::VTable0x80(Vector3& p_point1, Vector3& p_point2, Vector3
 	return FAILURE;
 }
 
-// STUB: LEGO1 0x1002d9c0
-void LegoPathActor::VTable0x88()
+// FUNCTION: LEGO1 0x1002d9c0
+MxResult LegoPathActor::VTable0x88(
+	LegoPathBoundary* p_boundary,
+	float p_time,
+	LegoEdge& p_srcEdge,
+	float p_srcScale,
+	LegoEdge& p_dstEdge,
+	float p_dstScale
+)
 {
-	// TODO
+	Vector3* v1 = p_srcEdge.GetOpposingPoint(p_boundary);
+	Vector3* v2 = p_srcEdge.GetPoint(p_boundary);
+	Vector3* v3 = p_dstEdge.GetOpposingPoint(p_boundary);
+	Vector3* v4 = p_dstEdge.GetPoint(p_boundary);
+	Mx3DPointFloat p1, p2, p3, p4, p5;
+	p1 = *v2;
+	((Vector3&) p1).Sub(v1);
+	((Vector3&) p1).Mul(p_srcScale);
+	((Vector3&) p1).Add(v1);
+	p2 = *v4;
+	((Vector3&) p2).Sub(v3);
+	((Vector3&) p2).Mul(p_dstScale);
+	((Vector3&) p2).Add(v3);
+	m_boundary = p_boundary;
+	m_destEdge = &p_dstEdge;
+	m_unk0xe4 = p_dstScale;
+	m_lastTime = p_time;
+	m_actorTime = p_time;
+	m_unk0x7c = 0;
+	p_dstEdge.FUN_1002ddc0(m_boundary, p3);
+	p4 = p2;
+	((Vector3&) p4).Sub(&p1);
+	float len = ((Vector3&) p4).LenSquared();
+	if (len > 0) {
+		len = sqrtf(len);
+		if (len > 0) {
+			p4.Div(len);
+		}
+	}
+	MxMatrix matrix;
+	Vector3 pos(matrix[3]);
+	Vector3 dir(matrix[2]);
+	Vector3 up(matrix[1]);
+	Vector3 right(matrix[0]);
+	matrix.SetIdentity();
+	pos = p1;
+	dir = p4;
+	up = *m_boundary->GetUnknown0x14();
+	if (!m_cameraFlag || !m_userNavFlag) {
+		((Vector3&) dir).Mul(-1.0f);
+	}
+	right.EqualsCross(&up, &dir);
+	m_roi->FUN_100a46b0(matrix);
+	if (m_cameraFlag && m_userNavFlag) {
+		m_boundary->AddActor(this);
+		FUN_10010c30();
+	}
+	else {
+		((Vector3&) p5).EqualsCrossImpl(p_boundary->GetUnknown0x14()->GetData(), p3.GetData());
+		float len2 = ((Vector3&) p5).LenSquared();
+		if (len2 > 0) {
+			len2 = sqrtf(len2);
+			if (len2 > 0) {
+				p5.Div(len2);
+			}
+		}
+		if (VTable0x80(p1, p4, p2, p5) != SUCCESS) {
+			return FAILURE;
+		}
+		m_boundary->AddActor(this);
+	}
+	m_unk0xec = m_roi->GetLocal2World();
+	return SUCCESS;
 }
 
 // STUB: LEGO1 0x1002de10
diff --git a/LEGO1/lego/legoomni/src/paths/legopathboundary.cpp b/LEGO1/lego/legoomni/src/paths/legopathboundary.cpp
index 641ece72..19afed47 100644
--- a/LEGO1/lego/legoomni/src/paths/legopathboundary.cpp
+++ b/LEGO1/lego/legoomni/src/paths/legopathboundary.cpp
@@ -1,6 +1,7 @@
 #include "legopathboundary.h"
 
 #include "decomp.h"
+#include "legopathactor.h"
 
 DECOMP_SIZE_ASSERT(LegoPathBoundary, 0x74)
 
@@ -8,3 +9,11 @@ DECOMP_SIZE_ASSERT(LegoPathBoundary, 0x74)
 LegoPathBoundary::LegoPathBoundary()
 {
 }
+
+// FUNCTION: LEGO1 0x100573f0
+MxResult LegoPathBoundary::AddActor(LegoPathActor* p_actor)
+{
+	m_unk0x54.insert(p_actor);
+	p_actor->SetBoundary(this);
+	return SUCCESS;
+}
diff --git a/LEGO1/lego/sources/geom/legoedge.cpp b/LEGO1/lego/sources/geom/legoedge.cpp
index 63e988c0..478e5830 100644
--- a/LEGO1/lego/sources/geom/legoedge.cpp
+++ b/LEGO1/lego/sources/geom/legoedge.cpp
@@ -4,6 +4,14 @@
 
 DECOMP_SIZE_ASSERT(LegoEdge, 0x24)
 
+// TODO Based on the offset, this should be in the header, but as a stub it's getting inlined when there...
+// STUB: LEGO1 0x1002ddc0
+LegoResult LegoEdge::FUN_1002ddc0(LegoWEEdge* p_face, Vector3& p_point)
+{
+	// TODO
+	return SUCCESS;
+}
+
 // FUNCTION: LEGO1 0x1009a470
 LegoEdge::LegoEdge()
 {
diff --git a/LEGO1/lego/sources/geom/legoedge.h b/LEGO1/lego/sources/geom/legoedge.h
index 81396dc4..a3b71b64 100644
--- a/LEGO1/lego/sources/geom/legoedge.h
+++ b/LEGO1/lego/sources/geom/legoedge.h
@@ -1,6 +1,7 @@
 #ifndef __LEGOEDGE_H
 #define __LEGOEDGE_H
 
+#include "misc/legotypes.h"
 #include "realtime/vector.h"
 
 class LegoWEEdge;
@@ -16,6 +17,8 @@ struct LegoEdge {
 	Vector3* GetOpposingPoint(LegoWEEdge* face);
 	Vector3* GetPoint(LegoWEEdge* face);
 
+	LegoResult FUN_1002ddc0(LegoWEEdge* p_face, Vector3& p_point);
+
 	// SYNTHETIC: LEGO1 0x1009a4a0
 	// LegoEdge::`scalar deleting destructor'
 
diff --git a/LEGO1/lego/sources/geom/legowegedge.h b/LEGO1/lego/sources/geom/legowegedge.h
index c2838123..34a285b3 100644
--- a/LEGO1/lego/sources/geom/legowegedge.h
+++ b/LEGO1/lego/sources/geom/legowegedge.h
@@ -15,6 +15,7 @@ class LegoWEGEdge : public LegoWEEdge {
 	LegoResult VTable0x04() override; // vtable+0x04
 
 	inline LegoU32 GetFlag0x10() { return m_unk0x0c & 0x10 ? FALSE : TRUE; }
+	inline Mx4DPointFloat* GetUnknown0x14() { return &m_unk0x14; }
 	inline Mx4DPointFloat* GetEdgeNormal(int index) { return &m_edgeNormals[index]; }
 
 	// SYNTHETIC: LEGO1 0x1009a7e0