diff --git a/src/p_sectors.cpp b/src/p_sectors.cpp
index dd0eb882c..1abb971b6 100644
--- a/src/p_sectors.cpp
+++ b/src/p_sectors.cpp
@@ -2230,6 +2230,26 @@ DEFINE_ACTION_FUNCTION(_Sector, NextLowestFloorAt)
 	 ACTION_RETURN_INT(self->Index());
  }
 
+ //=====================================================================================
+//
+//
+//=====================================================================================
+
+ DEFINE_ACTION_FUNCTION(_Side, SetSpecialColor)
+ {
+	 PARAM_SELF_STRUCT_PROLOGUE(side_t);
+	 PARAM_INT(tier);
+	 PARAM_INT(position);
+	 PARAM_COLOR(color);
+	 if (tier >= 0 && tier < 3 && position >= 0 && position < 2)
+	 {
+		 color.a = 255;
+		 self->SetSpecialColor(tier, position, color);
+	 }
+	 return 0;
+ }
+
+
  DEFINE_ACTION_FUNCTION(_Vertex, Index)
  {
 	 PARAM_SELF_STRUCT_PROLOGUE(vertex_t);
diff --git a/wadsrc/static/zscript/mapdata.txt b/wadsrc/static/zscript/mapdata.txt
index 549513b4a..11827e3ad 100644
--- a/wadsrc/static/zscript/mapdata.txt
+++ b/wadsrc/static/zscript/mapdata.txt
@@ -45,6 +45,12 @@ struct Side native play
 		bottom=2
 	};
 	
+	enum EColorPos
+	{
+		walltop = 0,
+		wallbottom = 1
+	}
+	
 	enum EWallFlags
 	{
 		WALLF_ABSLIGHTING	 = 1,	// Light is absolute instead of relative
@@ -57,6 +63,7 @@ struct Side native play
 		WALLF_LIGHT_FOG      = 128,	// This wall's Light is used even in fog.
 	};
 
+
 	native readonly Sector sector;			// Sector the SideDef is facing.
 	//DBaseDecal*	AttachedDecals;	// [RH] Decals bound to the wall
 	native readonly Line linedef;
@@ -77,6 +84,7 @@ struct Side native play
 	native void SetTextureYScale(int which, double scale);
 	native double GetTextureYScale(int which);
 	native void MultiplyTextureYScale(int which, double delta);
+	native void SetSpecialColor(int tier, int position, Color scolor);
 	//native DInterpolation *SetInterpolation(int position);
 	//native void StopInterpolation(int position);