diff --git a/src/gui/game/BitmapBrush.cpp b/src/gui/game/BitmapBrush.cpp
index 0ff418d84..b3aa735ca 100644
--- a/src/gui/game/BitmapBrush.cpp
+++ b/src/gui/game/BitmapBrush.cpp
@@ -22,7 +22,7 @@ BitmapBrush::BitmapBrush(ui::Point inputSize, unsigned char const *inputBitmap):
 	for (int y = 0; y < inputSize.Y; y++)
 		for (int x = 0; x < inputSize.X; x++)
 			origBitmap[x + y * newSize.X] = inputBitmap[x + y * inputSize.X];
-};
+}
 
 std::pair<ui::Point, std::unique_ptr<unsigned char []>> BitmapBrush::GenerateBitmap() const
 {
@@ -60,3 +60,11 @@ std::pair<ui::Point, std::unique_ptr<unsigned char []>> BitmapBrush::GenerateBit
 	}
 	return std::make_pair(radius, std::move(bitmap));
 }
+
+std::unique_ptr<Brush> BitmapBrush::Clone() const
+{
+	auto into = std::make_unique<BitmapBrush>(origSize, &origBitmap[0]);
+	into->radius = radius;
+	copyBitmaps(*into);
+	return into;
+}
diff --git a/src/gui/game/BitmapBrush.h b/src/gui/game/BitmapBrush.h
index 1eece024e..36bc4041d 100644
--- a/src/gui/game/BitmapBrush.h
+++ b/src/gui/game/BitmapBrush.h
@@ -31,4 +31,6 @@ public:
 		this->radius = radius;
 		InvalidateCache();
 	}
+
+	std::unique_ptr<Brush> Clone() const override;
 };
diff --git a/src/gui/game/Brush.cpp b/src/gui/game/Brush.cpp
index 8ab47461b..ef1a6b16c 100644
--- a/src/gui/game/Brush.cpp
+++ b/src/gui/game/Brush.cpp
@@ -73,6 +73,22 @@ void Brush::AdjustSize(int delta, bool logarithmic, bool keepX, bool keepY)
 		SetRadius(newSize);
 }
 
+void Brush::copyBitmaps(Brush &into) const
+{
+	into.size = size;
+	size_t bounds = (2 * size.X + 1) * (2 * size.Y + 1);
+	if (bitmap)
+	{
+		into.bitmap = std::make_unique<unsigned char []>(bounds);
+		std::copy(&bitmap[0], &bitmap[bounds], &into.bitmap[0]);
+	}
+	if (outline)
+	{
+		into.outline = std::make_unique<unsigned char []>(bounds);
+		std::copy(&outline[0], &outline[bounds], &into.outline[0]);
+	}
+}
+
 void Brush::RenderRect(Renderer * ren, ui::Point position1, ui::Point position2) const
 {
 	int width, height;
diff --git a/src/gui/game/Brush.h b/src/gui/game/Brush.h
index 86f10cfec..6c5b281e0 100644
--- a/src/gui/game/Brush.h
+++ b/src/gui/game/Brush.h
@@ -42,7 +42,6 @@ private:
 			return x != other.x || y != other.y;
 		}
 
-	public:
 		using difference_type = void;
 		using value_type = ui::Point;
 		using pointer = void;
@@ -60,12 +59,14 @@ protected:
 
 	void InvalidateCache();
 	virtual std::pair<ui::Point, std::unique_ptr<unsigned char []>> GenerateBitmap() const = 0;
+	void copyBitmaps(Brush &into) const;
 
 public:
 	virtual ~Brush() = default;
 	virtual ui::Point GetRadius() const = 0;
 	virtual void SetRadius(ui::Point radius) = 0;
 	virtual void AdjustSize(int delta, bool logarithmic, bool keepX, bool keepY);
+	virtual std::unique_ptr<Brush> Clone() const = 0;
 
 	ui::Point GetSize() const
 	{
diff --git a/src/gui/game/EllipseBrush.h b/src/gui/game/EllipseBrush.h
index 9b4633aac..99e7e06af 100644
--- a/src/gui/game/EllipseBrush.h
+++ b/src/gui/game/EllipseBrush.h
@@ -77,4 +77,11 @@ public:
 		this->radius = radius;
 		InvalidateCache();
 	}
+
+	std::unique_ptr<Brush> Clone() const override
+	{
+		auto into = std::make_unique<EllipseBrush>(radius, perfectCircle);
+		copyBitmaps(*into);
+		return into;
+	}
 };
diff --git a/src/gui/game/GameModel.cpp b/src/gui/game/GameModel.cpp
index 5ff5e9ca5..ddb2e15ba 100644
--- a/src/gui/game/GameModel.cpp
+++ b/src/gui/game/GameModel.cpp
@@ -472,19 +472,18 @@ void GameModel::BuildBrushList()
 	brushList.push_back(std::make_unique<TriangleBrush>(ui::Point(4, 4)));
 
 	//Load more from brushes folder
-	std::vector<ByteString> brushFiles = Platform::DirectorySearch(BRUSH_DIR, "", { ".ptb" });
-	for (size_t i = 0; i < brushFiles.size(); i++)
+	for (ByteString brushFile : Platform::DirectorySearch(BRUSH_DIR, "", { ".ptb" }))
 	{
 		std::vector<char> brushData;
-		if (!Platform::ReadFile(brushData, ByteString::Build(BRUSH_DIR, PATH_SEP_CHAR, brushFiles[i])))
+		if (!Platform::ReadFile(brushData, ByteString::Build(BRUSH_DIR, PATH_SEP_CHAR, brushFile)))
 		{
-			std::cout << "Brushes: Skipping " << brushFiles[i] << ". Could not open" << std::endl;
+			std::cout << "Brushes: Skipping " << brushFile << ". Could not open" << std::endl;
 			continue;
 		}
-		auto dimension = size_t(std::sqrt(float(brushData.size())));
+		auto dimension = size_t(std::sqrt(brushData.size()));
 		if (dimension * dimension != brushData.size())
 		{
-			std::cout << "Brushes: Skipping " << brushFiles[i] << ". Invalid bitmap size" << std::endl;
+			std::cout << "Brushes: Skipping " << brushFile << ". Invalid bitmap size" << std::endl;
 			continue;
 		}
 		brushList.push_back(std::make_unique<BitmapBrush>(ui::Point(dimension, dimension), reinterpret_cast<unsigned char const *>(brushData.data())));
@@ -812,9 +811,12 @@ Brush &GameModel::GetBrush()
 	return *brushList[currentBrush];
 }
 
-std::vector<std::unique_ptr<Brush>> const &GameModel::GetBrushList()
+Brush *GameModel::GetBrushByID(int i)
 {
-	return brushList;
+	if (i >= 0 && i < (int)brushList.size())
+		return brushList[i].get();
+	else
+		return nullptr;
 }
 
 int GameModel::GetBrushID()
diff --git a/src/gui/game/GameModel.h b/src/gui/game/GameModel.h
index d06a23e5a..17a3135e1 100644
--- a/src/gui/game/GameModel.h
+++ b/src/gui/game/GameModel.h
@@ -176,7 +176,7 @@ public:
 	std::vector<Tool*> GetUnlistedTools();
 
 	Brush &GetBrush();
-	std::vector<std::unique_ptr<Brush>> const &GetBrushList();
+	Brush *GetBrushByID(int i);
 	int GetBrushID();
 	void SetBrushID(int i);
 
diff --git a/src/gui/game/RectangleBrush.h b/src/gui/game/RectangleBrush.h
index 5f26e1ac3..309e1db8e 100644
--- a/src/gui/game/RectangleBrush.h
+++ b/src/gui/game/RectangleBrush.h
@@ -32,4 +32,11 @@ public:
 		this->radius = radius;
 		InvalidateCache();
 	}
+
+	std::unique_ptr<Brush> Clone() const override
+	{
+		auto into = std::make_unique<RectangleBrush>(radius);
+		copyBitmaps(*into);
+		return into;
+	}
 };
diff --git a/src/gui/game/TriangleBrush.h b/src/gui/game/TriangleBrush.h
index 14056952a..771c71eaf 100644
--- a/src/gui/game/TriangleBrush.h
+++ b/src/gui/game/TriangleBrush.h
@@ -56,4 +56,11 @@ public:
 		this->radius = radius;
 		InvalidateCache();
 	}
+
+	std::unique_ptr<Brush> Clone() const override
+	{
+		auto into = std::make_unique<RectangleBrush>(radius);
+		copyBitmaps(*into);
+		return into;
+	}
 };
diff --git a/src/lua/LuaScriptInterface.cpp b/src/lua/LuaScriptInterface.cpp
index de66d43cb..49ac36428 100644
--- a/src/lua/LuaScriptInterface.cpp
+++ b/src/lua/LuaScriptInterface.cpp
@@ -1469,17 +1469,16 @@ int LuaScriptInterface::simulation_createParts(lua_State * l)
 	int rx = luaL_optint(l,3,5);
 	int ry = luaL_optint(l,4,5);
 	int c = luaL_optint(l,5,luacon_model->GetActiveTool(0)->GetToolID());
-	int brush = luaL_optint(l,6,CIRCLE_BRUSH);
+	int brushID = luaL_optint(l,6,CIRCLE_BRUSH);
 	int flags = luaL_optint(l,7,luacon_sim->replaceModeFlags);
 
-	auto &brushList = luacon_model->GetBrushList();
-	if (brush < 0 || brush >= (int)brushList.size())
-		return luaL_error(l, "Invalid brush id '%d'", brush);
-	ui::Point tempRadius = brushList[brush]->GetRadius();
-	brushList[brush]->SetRadius(ui::Point(rx, ry));
+	Brush *brush = luacon_model->GetBrushByID(brushID);
+	if (!brush)
+		return luaL_error(l, "Invalid brush id '%d'", brushID);
+	auto newBrush = brush->Clone();
+	newBrush->SetRadius(ui::Point(rx, ry));
 
-	int ret = luacon_sim->CreateParts(x, y, c, *brushList[brush], flags);
-	brushList[brush]->SetRadius(tempRadius);
+	int ret = luacon_sim->CreateParts(x, y, c, *newBrush, flags);
 	lua_pushinteger(l, ret);
 	return 1;
 }
@@ -1493,17 +1492,16 @@ int LuaScriptInterface::simulation_createLine(lua_State * l)
 	int rx = luaL_optint(l,5,5);
 	int ry = luaL_optint(l,6,5);
 	int c = luaL_optint(l,7,luacon_model->GetActiveTool(0)->GetToolID());
-	int brush = luaL_optint(l,8,CIRCLE_BRUSH);
+	int brushID = luaL_optint(l,8,CIRCLE_BRUSH);
 	int flags = luaL_optint(l,9,luacon_sim->replaceModeFlags);
 
-	auto &brushList = luacon_model->GetBrushList();
-	if (brush < 0 || brush >= (int)brushList.size())
-		return luaL_error(l, "Invalid brush id '%d'", brush);
-	ui::Point tempRadius = brushList[brush]->GetRadius();
-	brushList[brush]->SetRadius(ui::Point(rx, ry));
+	Brush *brush = luacon_model->GetBrushByID(brushID);
+	if (!brush)
+		return luaL_error(l, "Invalid brush id '%d'", brushID);
+	auto newBrush = brush->Clone();
+	newBrush->SetRadius(ui::Point(rx, ry));
 
-	luacon_sim->CreateLine(x1, y1, x2, y2, c, *brushList[brush], flags);
-	brushList[brush]->SetRadius(tempRadius);
+	luacon_sim->CreateLine(x1, y1, x2, y2, c, *newBrush, flags);
 	return 0;
 }
 
@@ -1527,10 +1525,10 @@ int LuaScriptInterface::simulation_floodParts(lua_State * l)
 	int c = luaL_optint(l,3,luacon_model->GetActiveTool(0)->GetToolID());
 	int cm = luaL_optint(l,4,-1);
 	int flags = luaL_optint(l,5,luacon_sim->replaceModeFlags);
-	
+
 	if (x < 0 || x >= XRES || y < 0 || y >= YRES)
 		return luaL_error(l, "coordinates out of range (%d,%d)", x, y);
-	
+
 	int ret = luacon_sim->FloodParts(x, y, c, cm, flags);
 	lua_pushinteger(l, ret);
 	return 1;
@@ -1617,7 +1615,7 @@ int LuaScriptInterface::simulation_toolBrush(lua_State * l)
 	int rx = luaL_optint(l,3,5);
 	int ry = luaL_optint(l,4,5);
 	int tool = luaL_optint(l,5,0);
-	int brush = luaL_optint(l,6,CIRCLE_BRUSH);
+	int brushID = luaL_optint(l,6,CIRCLE_BRUSH);
 	float strength = luaL_optnumber(l,7,1.0f);
 	if (tool == (int)luacon_sim->tools.size())
 	{
@@ -1627,14 +1625,13 @@ int LuaScriptInterface::simulation_toolBrush(lua_State * l)
 	else if (tool < 0 || tool > (int)luacon_sim->tools.size())
 		return luaL_error(l, "Invalid tool id '%d'", tool);
 
-	auto &brushList = luacon_model->GetBrushList();
-	if (brush < 0 || brush >= (int)brushList.size())
-		return luaL_error(l, "Invalid brush id '%d'", brush);
-	ui::Point tempRadius = brushList[brush]->GetRadius();
-	brushList[brush]->SetRadius(ui::Point(rx, ry));
+	Brush *brush = luacon_model->GetBrushByID(brushID);
+	if (!brush)
+		return luaL_error(l, "Invalid brush id '%d'", brushID);
+	auto newBrush = brush->Clone();
+	newBrush->SetRadius(ui::Point(rx, ry));
 
-	int ret = luacon_sim->ToolBrush(x, y, tool, *brushList[brush], strength);
-	brushList[brush]->SetRadius(tempRadius);
+	int ret = luacon_sim->ToolBrush(x, y, tool, *newBrush, strength);
 	lua_pushinteger(l, ret);
 	return 1;
 }
@@ -1648,31 +1645,30 @@ int LuaScriptInterface::simulation_toolLine(lua_State * l)
 	int rx = luaL_optint(l,5,5);
 	int ry = luaL_optint(l,6,5);
 	int tool = luaL_optint(l,7,0);
-	int brush = luaL_optint(l,8,CIRCLE_BRUSH);
+	int brushID = luaL_optint(l,8,CIRCLE_BRUSH);
 	float strength = luaL_optnumber(l,9,1.0f);
-	
+
 	if (x1 < 0 || x2 < 0 || x1 >= XRES || x2 >= XRES || y1 < 0 || y2 < 0 || y1 >= YRES || y2 >= YRES)
 		return luaL_error(l, "coordinates out of range (%d,%d),(%d,%d)", x1, y1, x2, y2);
 	if (tool < 0 || tool >= (int)luacon_sim->tools.size()+1)
 		return luaL_error(l, "Invalid tool id '%d'", tool);
 
-	auto &brushList = luacon_model->GetBrushList();
-	if (brush < 0 || brush >= (int)brushList.size())
-		return luaL_error(l, "Invalid brush id '%d'", brush);
-	ui::Point tempRadius = brushList[brush]->GetRadius();
-	brushList[brush]->SetRadius(ui::Point(rx, ry));
+	Brush *brush = luacon_model->GetBrushByID(brushID);
+	if (!brush)
+		return luaL_error(l, "Invalid brush id '%d'", brushID);
+	auto newBrush = brush->Clone();
+	newBrush->SetRadius(ui::Point(rx, ry));
 
 	if (tool == (int)luacon_sim->tools.size())
 	{
 		Tool *windTool = luacon_model->GetToolFromIdentifier("DEFAULT_UI_WIND");
 		float oldStrength = windTool->GetStrength();
 		windTool->SetStrength(strength);
-		windTool->DrawLine(luacon_sim, *brushList[brush], ui::Point(x1, y1), ui::Point(x2, y2));
+		windTool->DrawLine(luacon_sim, *newBrush, ui::Point(x1, y1), ui::Point(x2, y2));
 		windTool->SetStrength(oldStrength);
 	}
 	else
-		luacon_sim->ToolLine(x1, y1, x2, y2, tool, *brushList[brush], strength);
-	brushList[brush]->SetRadius(tempRadius);
+		luacon_sim->ToolLine(x1, y1, x2, y2, tool, *newBrush, strength);
 	return 0;
 }
 
@@ -1709,16 +1705,15 @@ int LuaScriptInterface::simulation_decoBrush(lua_State * l)
 	int b = luaL_optint(l,7,255);
 	int a = luaL_optint(l,8,255);
 	int tool = luaL_optint(l,9,DECO_DRAW);
-	int brush = luaL_optint(l,10,CIRCLE_BRUSH);
+	int brushID = luaL_optint(l,10,CIRCLE_BRUSH);
 
-	auto &brushList = luacon_model->GetBrushList();
-	if (brush < 0 || brush >= (int)brushList.size())
-		return luaL_error(l, "Invalid brush id '%d'", brush);
-	ui::Point tempRadius = brushList[brush]->GetRadius();
-	brushList[brush]->SetRadius(ui::Point(rx, ry));
+	Brush *brush = luacon_model->GetBrushByID(brushID);
+	if (!brush)
+		return luaL_error(l, "Invalid brush id '%d'", brushID);
+	auto newBrush = brush->Clone();
+	newBrush->SetRadius(ui::Point(rx, ry));
 
-	luacon_sim->ApplyDecorationPoint(x, y, r, g, b, a, tool, *brushList[brush]);
-	brushList[brush]->SetRadius(tempRadius);
+	luacon_sim->ApplyDecorationPoint(x, y, r, g, b, a, tool, *newBrush);
 	return 0;
 }
 
@@ -1735,19 +1730,18 @@ int LuaScriptInterface::simulation_decoLine(lua_State * l)
 	int b = luaL_optint(l,9,255);
 	int a = luaL_optint(l,10,255);
 	int tool = luaL_optint(l,11,DECO_DRAW);
-	int brush = luaL_optint(l,12,CIRCLE_BRUSH);
+	int brushID = luaL_optint(l,12,CIRCLE_BRUSH);
 
 	if (x1 < 0 || x2 < 0 || x1 >= XRES || x2 >= XRES || y1 < 0 || y2 < 0 || y1 >= YRES || y2 >= YRES)
 		return luaL_error(l, "coordinates out of range (%d,%d),(%d,%d)", x1, y1, x2, y2);
 
-	auto &brushList = luacon_model->GetBrushList();
-	if (brush < 0 || brush >= (int)brushList.size())
-		return luaL_error(l, "Invalid brush id '%d'", brush);
-	ui::Point tempRadius = brushList[brush]->GetRadius();
-	brushList[brush]->SetRadius(ui::Point(rx, ry));
+	Brush *brush = luacon_model->GetBrushByID(brushID);
+	if (!brush)
+		return luaL_error(l, "Invalid brush id '%d'", brushID);
+	auto newBrush = brush->Clone();
+	newBrush->SetRadius(ui::Point(rx, ry));
 
-	luacon_sim->ApplyDecorationLine(x1, y1, x2, y2, r, g, b, a, tool, *brushList[brush]);
-	brushList[brush]->SetRadius(tempRadius);
+	luacon_sim->ApplyDecorationLine(x1, y1, x2, y2, r, g, b, a, tool, *newBrush);
 	return 0;
 }
 
@@ -2200,22 +2194,19 @@ int LuaScriptInterface::simulation_brush(lua_State * l)
 	}
 	int brushID = luaL_optint(l, 5, luacon_model->GetBrushID());
 
-	auto &brushList = luacon_model->GetBrushList();
-	if (brushID < 0 || brushID >= (int)brushList.size())
+	Brush *brush = luacon_model->GetBrushByID(brushID);
+	if (!brush)
 		return luaL_error(l, "Invalid brush id '%d'", brushID);
-
-	Brush &brush = *brushList[brushID];
-	ui::Point tempRadius = brush.GetRadius();
-	brush.SetRadius(ui::Point(brushradiusX, brushradiusY));
+	auto newBrush = brush->Clone();
+	newBrush->SetRadius(ui::Point(brushradiusX, brushradiusY));
 	lua_pushnumber(l, positionX);
 	lua_pushnumber(l, positionY);
 	std::vector<ui::Point> points;
-	std::copy(brush.begin(), brush.end(), std::back_inserter(points));
+	std::copy(brush->begin(), brush->end(), std::back_inserter(points));
 	lua_pushnumber(l, 0); // index
 	lua_pushnumber(l, points.size());
 	auto points_ud = reinterpret_cast<ui::Point *>(lua_newuserdata(l, points.size() * sizeof(ui::Point)));
 	std::copy(points.begin(), points.end(), points_ud);
-	brush.SetRadius(tempRadius);
 
 	lua_pushcclosure(l, BrushClosure, 5);
 	return 1;