diff --git a/LEGO1/lego/legoomni/include/legoanimpresenter.h b/LEGO1/lego/legoomni/include/legoanimpresenter.h
index 8c6f5290..bc9292c7 100644
--- a/LEGO1/lego/legoomni/include/legoanimpresenter.h
+++ b/LEGO1/lego/legoomni/include/legoanimpresenter.h
@@ -92,7 +92,7 @@ class LegoAnimPresenter : public MxVideoPresenter {
 	LegoBool FUN_1006aba0();
 	LegoBool FUN_1006abb0(LegoTreeNode*, undefined4);
 	void FUN_1006ac90();
-	void FUN_1006c8a0(LegoBool);
+	void FUN_1006c8a0(MxBool p_bool);
 
 	LegoAnim* m_anim;          // 0x64
 	LegoROI** m_unk0x68;       // 0x68
diff --git a/LEGO1/lego/legoomni/include/legoentity.h b/LEGO1/lego/legoomni/include/legoentity.h
index 92571dc9..53c6ab3d 100644
--- a/LEGO1/lego/legoomni/include/legoentity.h
+++ b/LEGO1/lego/legoomni/include/legoentity.h
@@ -80,6 +80,8 @@ class LegoEntity : public MxEntity {
 	inline void SetFlags(MxU8 p_flags) { m_flags = p_flags; }
 	inline void SetFlag(MxU8 p_flag) { m_flags |= p_flag; }
 	inline void ClearFlag(MxU8 p_flag) { m_flags &= ~p_flag; }
+	inline void SetUnknown0x10Flag(MxU8 p_flag) { m_unk0x10 |= p_flag; }
+	inline void ClearUnknown0x10Flag(MxU8 p_flag) { m_unk0x10 &= ~p_flag; }
 
 protected:
 	void Init();
diff --git a/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp b/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
index 64f550b2..2d33163b 100644
--- a/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
+++ b/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
@@ -638,10 +638,23 @@ void LegoAnimPresenter::VTable0x90()
 	// TODO
 }
 
-// STUB: LEGO1 0x1006c8a0
-void LegoAnimPresenter::FUN_1006c8a0(LegoBool)
+// FUNCTION: LEGO1 0x1006c8a0
+void LegoAnimPresenter::FUN_1006c8a0(MxBool p_bool)
 {
-	// TODO
+	if (m_unk0x6c != 0 && m_unk0x68 != NULL) {
+		for (MxU32 i = 1; i <= m_unk0x6c; i++) {
+			LegoEntity* entity = m_unk0x68[i]->GetEntity();
+
+			if (entity != NULL) {
+				if (p_bool) {
+					entity->SetUnknown0x10Flag(LegoEntity::c_altBit1);
+				}
+				else {
+					entity->ClearUnknown0x10Flag(LegoEntity::c_altBit1);
+				}
+			}
+		}
+	}
 }
 
 // STUB: LEGO1 0x1006c8f0