diff --git a/src/game/DecorationTool.h b/src/game/DecorationTool.h
index 5a11bc6bf..c45eca32d 100644
--- a/src/game/DecorationTool.h
+++ b/src/game/DecorationTool.h
@@ -7,7 +7,7 @@
 class DecorationTool: public Tool
 {
 public:
-	enum ToolType { BlendAdd = DECO_ADD, BlendRemove = DECO_SUBTRACT, BlendMultiply = DECO_MULTIPLY, BlendDivide = DECO_DIVIDE, BlendSet = DECO_DRAW };
+	enum ToolType { BlendAdd = DECO_ADD, BlendRemove = DECO_SUBTRACT, BlendMultiply = DECO_MULTIPLY, BlendDivide = DECO_DIVIDE, BlendSet = DECO_DRAW, BlendSmudge = DECO_SMUDGE };
 
 	ToolType decoMode;
 
diff --git a/src/game/GameModel.cpp b/src/game/GameModel.cpp
index fa18e24f9..5a29d098a 100644
--- a/src/game/GameModel.cpp
+++ b/src/game/GameModel.cpp
@@ -97,6 +97,7 @@ GameModel::GameModel():
 	menuList[SC_DECO]->AddTool(new DecorationTool(DecorationTool::BlendRemove, "SUB", 0, 0, 0));
 	menuList[SC_DECO]->AddTool(new DecorationTool(DecorationTool::BlendMultiply, "MUL", 0, 0, 0));
 	menuList[SC_DECO]->AddTool(new DecorationTool(DecorationTool::BlendDivide, "DIV", 0, 0, 0));
+	menuList[SC_DECO]->AddTool(new DecorationTool(DecorationTool::BlendSmudge, "SMDG", 0, 0, 0));
 	menuList[SC_DECO]->AddTool(new DecorationTool(DecorationTool::BlendSet, "SET", 0, 0, 0));
 
 	//Set default brush palette
diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp
index 7941d25ac..aaa48346d 100644
--- a/src/simulation/Simulation.cpp
+++ b/src/simulation/Simulation.cpp
@@ -371,6 +371,28 @@ void Simulation::ApplyDecoration(int x, int y, int colR_, int colG_, int colB_,
 		tg /= 1.0f+(colG*0.1f)*colA;
 		tb /= 1.0f+(colB*0.1f)*colA;
 	}
+	else if (mode == DECO_SMUDGE)
+	{
+		int rx, ry, num = 0;
+		for (rx=-2; rx<3; rx++)
+			for (ry=-2; ry<3; ry++)
+			{
+				if ((pmap[y+ry][x+rx]&0xFF) && parts[pmap[y+ry][x+rx]>>8].dcolour)
+				{
+					num++;
+					ta += float((parts[pmap[y+ry][x+rx]>>8].dcolour>>24)&0xFF)/255.0f;
+					tr += float((parts[pmap[y+ry][x+rx]>>8].dcolour>>16)&0xFF)/255.0f;
+					tg += float((parts[pmap[y+ry][x+rx]>>8].dcolour>>8)&0xFF)/255.0f;
+					tb += float((parts[pmap[y+ry][x+rx]>>8].dcolour)&0xFF)/255.0f;
+				}
+			}
+		if (num == 0)
+			return;
+		ta = ta/float(num)+0.5f;
+		tr = tr/float(num)+0.5f;
+		tg = tg/float(num)+0.5f;
+		tb = tb/float(num)+0.5f;
+	}
 
 	colA_ = ta*255.0f;
 	colR_ = tr*255.0f;
diff --git a/src/simulation/SimulationData.h b/src/simulation/SimulationData.h
index 2c1345033..1e1c455ee 100644
--- a/src/simulation/SimulationData.h
+++ b/src/simulation/SimulationData.h
@@ -61,6 +61,7 @@
 #define DECO_SUBTRACT	2
 #define DECO_MULTIPLY	3
 #define DECO_DIVIDE	4
+#define DECO_SMUDGE 5
 
 //Old IDs for GOL types
 #define GT_GOL 78