diff --git a/src/gui/game/GameController.cpp b/src/gui/game/GameController.cpp
index cd8dcc945..8a81bd538 100644
--- a/src/gui/game/GameController.cpp
+++ b/src/gui/game/GameController.cpp
@@ -149,6 +149,7 @@ GameController::GameController():
 	ActiveToolChanged(0, gameModel->GetActiveTool(0));
 	ActiveToolChanged(1, gameModel->GetActiveTool(1));
 	ActiveToolChanged(2, gameModel->GetActiveTool(2));
+	ActiveToolChanged(3, gameModel->GetActiveTool(3));
 
 	//sim = new Simulation();
 	Client::Ref().AddListener(this);
diff --git a/src/lua/LegacyLuaAPI.cpp b/src/lua/LegacyLuaAPI.cpp
index 4c9649189..8f2ed2e1d 100644
--- a/src/lua/LegacyLuaAPI.cpp
+++ b/src/lua/LegacyLuaAPI.cpp
@@ -588,12 +588,13 @@ int luacon_mouseevent(int mx, int my, int mb, int event, int mouse_wheel)
 	return mpcontinue;
 }
 
-int luacon_step(int mx, int my, std::string selectl, std::string selectr, std::string selectalt, int bsx, int bsy)
+int luacon_step(int mx, int my, std::string selectl, std::string selectr, std::string selectalt, std::string selectreplace, int bsx, int bsy)
 {
 	int i, j, callret;
 	lua_State* l=luacon_ci->l;
 	lua_pushinteger(l, bsy);
 	lua_pushinteger(l, bsx);
+	lua_pushstring(l, selectreplace.c_str());
 	lua_pushstring(l, selectalt.c_str());
 	lua_pushstring(l, selectr.c_str());
 	lua_pushstring(l, selectl.c_str());
@@ -604,6 +605,7 @@ int luacon_step(int mx, int my, std::string selectl, std::string selectr, std::s
 	lua_setfield(l, tptProperties, "selectedl");
 	lua_setfield(l, tptProperties, "selectedr");
 	lua_setfield(l, tptProperties, "selecteda");
+	lua_setfield(l, tptProperties, "selectedreplace");
 	lua_setfield(l, tptProperties, "brushx");
 	lua_setfield(l, tptProperties, "brushy");
 	lua_pushstring(l, "stepfunctions");
diff --git a/src/lua/LuaScriptHelper.h b/src/lua/LuaScriptHelper.h
index 74098e042..6b8280337 100644
--- a/src/lua/LuaScriptHelper.h
+++ b/src/lua/LuaScriptHelper.h
@@ -21,7 +21,7 @@ extern int tptElements; //Table for TPT element names
 extern int tptParts, tptPartsMeta, tptElementTransitions, tptPartsCData, tptPartMeta, tptPart, cIndex;
 
 void luacon_hook(lua_State *L, lua_Debug *ar);
-int luacon_step(int mx, int my, std::string , std::string selectr, std::string selectedalt, int bsx, int bsy);
+int luacon_step(int mx, int my, std::string , std::string selectr, std::string selectedalt, std::string selectedreplace, int bsx, int bsy);
 int luacon_mouseevent(int mx, int my, int mb, int event, int mouse_wheel);
 int luacon_keyevent(int key, int modifier, int event);
 int luacon_eval(const char *command);
diff --git a/src/lua/LuaScriptInterface.cpp b/src/lua/LuaScriptInterface.cpp
index 9d09560c5..455c4427e 100644
--- a/src/lua/LuaScriptInterface.cpp
+++ b/src/lua/LuaScriptInterface.cpp
@@ -483,6 +483,7 @@ void LuaScriptInterface::initSimulationAPI()
 		{"loadStamp", simulation_loadStamp},
 		{"deleteStamp", simulation_deleteStamp},
 		{"loadSave", simulation_loadSave},
+		{"reloadSave", simulation_reloadSave},
 		{"getSaveID", simulation_getSaveID},
 		{"adjustCoords", simulation_adjustCoords},
 		{"prettyPowders", simulation_prettyPowders},
@@ -1430,6 +1431,12 @@ int LuaScriptInterface::simulation_loadSave(lua_State * l)
 	return 0;
 }
 
+int LuaScriptInterface::simulation_reloadSave(lua_State * l)
+{
+	luacon_controller->ReloadSim();
+	return 0;
+}
+
 int LuaScriptInterface::simulation_getSaveID(lua_State *l)
 {
 	SaveInfo *tempSave = luacon_model->GetSave();
@@ -2851,7 +2858,7 @@ void LuaScriptInterface::OnTick()
 	ui::Engine::Ref().LastTick(gettime());
 	if(luacon_mousedown)
 		luacon_mouseevent(luacon_mousex, luacon_mousey, luacon_mousebutton, LUACON_MPRESS, 0);
-	luacon_step(luacon_mousex, luacon_mousey, luacon_selectedl, luacon_selectedr, luacon_selectedalt, luacon_brushx, luacon_brushy);
+	luacon_step(luacon_mousex, luacon_mousey, luacon_selectedl, luacon_selectedr, luacon_selectedalt, luacon_selectedreplace, luacon_brushx, luacon_brushy);
 }
 
 int LuaScriptInterface::Command(std::string command)
diff --git a/src/lua/LuaScriptInterface.h b/src/lua/LuaScriptInterface.h
index 648d0b5bb..edef9dfe2 100644
--- a/src/lua/LuaScriptInterface.h
+++ b/src/lua/LuaScriptInterface.h
@@ -88,6 +88,7 @@ class LuaScriptInterface: public CommandInterface
 	static int simulation_loadStamp(lua_State * l);
 	static int simulation_deleteStamp(lua_State * l);
 	static int simulation_loadSave(lua_State * l);
+	static int simulation_reloadSave(lua_State * l);
 	static int simulation_getSaveID(lua_State * l);
 	static int simulation_adjustCoords(lua_State * l);
 	static int simulation_prettyPowders(lua_State * l);