diff --git a/src/game/GameController.cpp b/src/game/GameController.cpp
index 350bc25c9..ea21fd19f 100644
--- a/src/game/GameController.cpp
+++ b/src/game/GameController.cpp
@@ -653,6 +653,14 @@ void GameController::SetActiveMenu(Menu * menu)
 void GameController::SetActiveTool(int toolSelection, Tool * tool)
 {
 	gameModel->SetActiveTool(toolSelection, tool);
+	gameModel->GetRenderer()->gravityZonesEnabled = false;
+	for(int i = 0; i < 3; i++)
+	{
+		if(gameModel->GetActiveTool(i) == gameModel->GetMenuList().at(SC_WALL)->GetToolList().at(WL_GRAV))
+		{
+			gameModel->GetRenderer()->gravityZonesEnabled = true;
+		}
+	}	
 }
 
 void GameController::OpenSearch()
diff --git a/src/game/GameModel.cpp b/src/game/GameModel.cpp
index 85f54d389..9a9e8079b 100644
--- a/src/game/GameModel.cpp
+++ b/src/game/GameModel.cpp
@@ -138,6 +138,7 @@ void GameModel::BuildQuickOptionMenu()
 	quickOptions.push_back(new DecorationsOption(this));
 	quickOptions.push_back(new NGravityOption(this));
 	quickOptions.push_back(new AHeatOption(this));
+	quickOptions.push_back(new DrawGravWallOption(this));
 
 	notifyQuickOptionsChanged();
 	UpdateQuickOptions();
diff --git a/src/game/QuickOptions.h b/src/game/QuickOptions.h
index f194c1c18..b22834cac 100644
--- a/src/game/QuickOptions.h
+++ b/src/game/QuickOptions.h
@@ -29,11 +29,11 @@ public:
 	}
 	virtual bool GetToggle() 
 	{
-		return m->GetRenderer()->gravifyFieldEnabled;
+		return m->GetRenderer()->gravityFieldEnabled;
 	}
 	virtual void perform()
 	{
-		m->GetRenderer()->gravifyFieldEnabled = !m->GetRenderer()->gravifyFieldEnabled;
+		m->GetRenderer()->gravityFieldEnabled = !m->GetRenderer()->gravityFieldEnabled;
 	}
 };
 
@@ -96,4 +96,22 @@ public:
 	{
 		m->GetSimulation()->aheat_enable = !m->GetSimulation()->aheat_enable;
 	}
+};
+
+class DrawGravWallOption: public QuickOption
+{
+public:
+	DrawGravWallOption(GameModel * m):
+	QuickOption("Z", "Draw gravity zones", m, Toggle)
+	{
+
+	}
+	virtual bool GetToggle() 
+	{
+		return m->GetRenderer()->gravityZonesEnabled;
+	}
+	virtual void perform()
+	{
+		m->GetRenderer()->gravityZonesEnabled = !m->GetRenderer()->gravityZonesEnabled;
+	}
 };
\ No newline at end of file
diff --git a/src/graphics/Renderer.cpp b/src/graphics/Renderer.cpp
index 9949926eb..c1f24da51 100644
--- a/src/graphics/Renderer.cpp
+++ b/src/graphics/Renderer.cpp
@@ -43,6 +43,7 @@ void Renderer::RenderBegin()
 	render_parts();
 	render_fire();
 	DrawWalls();
+	draw_grav_zones();
 	DrawSigns();
 #ifndef OGLR
 	FinaliseParts();
@@ -1901,7 +1902,7 @@ void Renderer::draw_grav()
 	int x, y, i, ca;
 	float nx, ny, dist;
 
-	if(!gravifyFieldEnabled)
+	if(!gravityFieldEnabled)
 		return;
 
 	for (y=0; y<YRES/CELL; y++)
@@ -2062,12 +2063,15 @@ void Renderer::draw_air()
 
 void Renderer::draw_grav_zones()
 {
+	if(!gravityZonesEnabled)
+		return;
+
 	int x, y, i, j;
 	for (y=0; y<YRES/CELL; y++)
 	{
 		for (x=0; x<XRES/CELL; x++)
 		{
-			//if(sim->gravmask[y*(XRES/CELL)+x])
+			if(sim->grav->gravmask[y*(XRES/CELL)+x])
 			{
 				for (j=0; j<CELL; j++)//draws the colors
 					for (i=0; i<CELL; i++)
@@ -2102,7 +2106,8 @@ Renderer::Renderer(Graphics * g, Simulation * sim):
 	ZFACTOR(8),
 	zoomEnabled(false),
 	decorations_enable(1),
-	gravifyFieldEnabled(false)
+	gravityFieldEnabled(false),
+	gravityZonesEnabled(false)
 {
 	this->g = g;
 	this->sim = sim;
diff --git a/src/graphics/Renderer.h b/src/graphics/Renderer.h
index 721d39ec3..bf0f4489b 100644
--- a/src/graphics/Renderer.h
+++ b/src/graphics/Renderer.h
@@ -42,7 +42,8 @@ public:
 	char * plasma_data;
 	int emp_decor;
 	//
-	bool gravifyFieldEnabled;
+	bool gravityZonesEnabled;
+	bool gravityFieldEnabled;
 	int decorations_enable;
 	Simulation * sim;
 	Graphics * g;
diff --git a/src/simulation/Gravity.h b/src/simulation/Gravity.h
index e78332acf..8d81211e4 100644
--- a/src/simulation/Gravity.h
+++ b/src/simulation/Gravity.h
@@ -43,7 +43,6 @@ typedef struct mask_el mask_el;
 class Gravity
 {
 private:
-	unsigned *gravmask;
 
 	float *th_ogravmap;
 	float *th_gravmap;
@@ -68,6 +67,7 @@ private:
 
 	//Simulation * sim;
 public:
+	unsigned *gravmask;
 	float *gravmap;
 	float *gravp;
 	float *gravy;