diff --git a/src/common/rendering/hwrenderer/data/hw_meshbuilder.cpp b/src/common/rendering/hwrenderer/data/hw_meshbuilder.cpp
index 83a25200c..95317975c 100644
--- a/src/common/rendering/hwrenderer/data/hw_meshbuilder.cpp
+++ b/src/common/rendering/hwrenderer/data/hw_meshbuilder.cpp
@@ -14,6 +14,8 @@ struct NullLevelMeshUpdater : UpdateLevelMesh
 	virtual void FloorTextureChanged(struct sector_t *sector) {};
 	virtual void CeilingTextureChanged(struct sector_t *sector) {};
 
+	virtual void SectorChangedOther(struct sector_t *sector) {};
+
 	virtual void SideTextureChanged(struct side_t *side, int section) {};
 };
 
diff --git a/src/gamedata/r_defs.h b/src/gamedata/r_defs.h
index a50445ded..ba281b360 100644
--- a/src/gamedata/r_defs.h
+++ b/src/gamedata/r_defs.h
@@ -1004,27 +1004,28 @@ public:
 
 		if (val != old)
 		{
+			//not sure actually what TexZ does, so changing passing this as "Other"
 			if(pos)
 			{
-				LevelMeshUpdater->FloorHeightChanged(this);
+				LevelMeshUpdater->SectorChangedOther(this);
 			}
 			else
 			{
-				LevelMeshUpdater->CeilingHeightChanged(this);
+				LevelMeshUpdater->SectorChangedOther(this);
 			}
 		}
 	}
 
 	void SetPlaneTexZ(int pos, double val, bool dirtify = false)	// This mainly gets used by init code. The only place where it must set the vertex to dirty is the interpolation code.
 	{
-		planes[pos].TexZ = val;
+		SetPlaneTexZQuick(pos, val);
 		if (dirtify) SetAllVerticesDirty();
 		CheckOverlap();
 	}
 
 	void ChangePlaneTexZ(int pos, double val)
 	{
-		planes[pos].TexZ += val;
+		SetPlaneTexZQuick(pos, planes[pos].TexZ + val);
 		SetAllVerticesDirty();
 		CheckOverlap();
 	}
diff --git a/src/levelmeshhelper.h b/src/levelmeshhelper.h
index 69710cff8..f6b6eda23 100644
--- a/src/levelmeshhelper.h
+++ b/src/levelmeshhelper.h
@@ -11,6 +11,8 @@ struct UpdateLevelMesh
 	virtual void FloorTextureChanged(struct sector_t *sector) = 0;
 	virtual void CeilingTextureChanged(struct sector_t *sector) = 0;
 
+	virtual void SectorChangedOther(struct sector_t *sector) = 0;
+
 	virtual void SideTextureChanged(struct side_t *side, int section) = 0;
 };
 
diff --git a/src/scripting/vmthunks.cpp b/src/scripting/vmthunks.cpp
index 6e8ee58eb..2abff431e 100644
--- a/src/scripting/vmthunks.cpp
+++ b/src/scripting/vmthunks.cpp
@@ -1806,19 +1806,6 @@ DEFINE_ACTION_FUNCTION_NATIVE(_Secplane, isEqual, isPlaneEqual)
 	ACTION_RETURN_BOOL(*self == *other);
 }
 
-static void ChangeHeight(secplane_t *self, double hdiff)
-{
-	self->ChangeHeight(hdiff);
-}
-
-DEFINE_ACTION_FUNCTION_NATIVE(_Secplane, ChangeHeight, ChangeHeight)
-{
-	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
-	PARAM_FLOAT(hdiff);
-	self->ChangeHeight(hdiff);
-	return 0;
-}
-
 static double GetChangedHeight(const secplane_t *self, double hdiff)
 {
 	return self->GetChangedHeight(hdiff);