diff --git a/LEGO1/lego/legoomni/include/legoanimpresenter.h b/LEGO1/lego/legoomni/include/legoanimpresenter.h
index 36683461..22d4535c 100644
--- a/LEGO1/lego/legoomni/include/legoanimpresenter.h
+++ b/LEGO1/lego/legoomni/include/legoanimpresenter.h
@@ -101,7 +101,7 @@ class LegoAnimPresenter : public MxVideoPresenter {
 	void FUN_1006ab70();
 	LegoBool FUN_1006aba0();
 	MxBool FUN_1006abb0(LegoTreeNode* p_node, LegoROI* p_roi);
-	void FUN_1006ac90();
+	void SubstituteVariables();
 	void FUN_1006b900(LegoAnim* p_anim, MxLong p_time, Matrix4* p_matrix);
 	void FUN_1006b9a0(LegoAnim* p_anim, MxLong p_time, Matrix4* p_matrix);
 	void FUN_1006c8a0(MxBool p_bool);
diff --git a/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp b/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
index a038e042..13bada16 100644
--- a/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
+++ b/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
@@ -588,10 +588,17 @@ MxBool LegoAnimPresenter::FUN_1006abb0(LegoTreeNode* p_node, LegoROI* p_roi)
 	return result;
 }
 
-// STUB: LEGO1 0x1006ac90
-void LegoAnimPresenter::FUN_1006ac90()
+// FUNCTION: LEGO1 0x1006ac90
+// FUNCTION: BETA10 0x1005022e
+void LegoAnimPresenter::SubstituteVariables()
 {
-	// TODO
+	if (m_substMap != NULL) {
+		MxVariableTable* variableTable = VariableTable();
+
+		for (LegoAnimSubstMap::iterator it = m_substMap->begin(); it != m_substMap->end(); it++) {
+			variableTable->SetVariable((*it).first, (*it).second);
+		}
+	}
 }
 
 // FUNCTION: LEGO1 0x1006ad30
@@ -709,9 +716,10 @@ void LegoAnimPresenter::ReadyTickle()
 }
 
 // FUNCTION: LEGO1 0x1006b5e0
+// FUNCTION: BETA10 0x10050b85
 void LegoAnimPresenter::StartingTickle()
 {
-	FUN_1006ac90();
+	SubstituteVariables();
 	FUN_100692b0();
 	FUN_100695c0();