diff --git a/src/r_defs.h b/src/r_defs.h
index d152bf0e8..c93a240fb 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -1304,9 +1304,9 @@ struct side_t
 		return (part.flags & part::UseOwnColors) ? part.SpecialColors[slot] : frontsector->SpecialColors[sector_t::walltop + slot];
 	}
 
-	void SetAdditiveColor(int which, PalEntry rgb)
+	void SetAdditiveColor(int which, PalEntry rgb, bool use = true)
 	{
-		rgb.a = 255;
+		rgb.a = use ? 255 : 0;
 		textures[which].AdditiveColor = rgb;
 	}
 
diff --git a/src/scripting/vmthunks.cpp b/src/scripting/vmthunks.cpp
index efee33215..7181375b7 100644
--- a/src/scripting/vmthunks.cpp
+++ b/src/scripting/vmthunks.cpp
@@ -555,7 +555,7 @@ DEFINE_ACTION_FUNCTION_NATIVE(_Sector, SetAdditiveColor, SetAdditiveColor)
 	PARAM_SELF_STRUCT_PROLOGUE(sector_t);
 	PARAM_INT(pos);
 	PARAM_COLOR(color);
-	SetSpecialColor(self, pos, color);
+	SetAdditiveColor(self, pos, color);
 	return 0;
 }
 
@@ -1558,11 +1558,11 @@ DEFINE_ACTION_FUNCTION_NATIVE(_Sector, RemoveForceField, RemoveForceField)
 	 return 0;
  }
 
- static void SetSideAdditiveColor(side_t *self, int tier, int color)
+ static void SetSideAdditiveColor(side_t *self, int tier, int color, bool use)
  {
 	 if (tier >= 0 && tier < 3)
 	 {
-		 self->SetAdditiveColor(tier, color);
+		 self->SetAdditiveColor(tier, color, use);
 	 }
  }
 
@@ -1571,7 +1571,8 @@ DEFINE_ACTION_FUNCTION_NATIVE(_Sector, RemoveForceField, RemoveForceField)
 	 PARAM_SELF_STRUCT_PROLOGUE(side_t);
 	 PARAM_INT(tier);
 	 PARAM_COLOR(color);
-	 SetSideAdditiveColor(self, tier, color);
+	 PARAM_BOOL(use);
+	 SetSideAdditiveColor(self, tier, color, use);
 	 return 0;
  }
 
diff --git a/wadsrc/static/zscript/mapdata.txt b/wadsrc/static/zscript/mapdata.txt
index a63c95f0e..155888581 100644
--- a/wadsrc/static/zscript/mapdata.txt
+++ b/wadsrc/static/zscript/mapdata.txt
@@ -87,7 +87,7 @@ struct Side native play
 	native void MultiplyTextureYScale(int which, double delta);
 	native void SetSpecialColor(int tier, int position, Color scolor);
 	native Color GetAdditiveColor(int tier);
-	native void SetAdditiveColor(int tier, Color color);
+	native void SetAdditiveColor(int tier, Color color, bool use = true);
 	//native DInterpolation *SetInterpolation(int position);
 	//native void StopInterpolation(int position);