diff --git a/src/dungeongen.cpp b/src/dungeongen.cpp
diff --git a/src/dungeongen.h b/src/dungeongen.h
@@ -30,7 +30,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 class ManualMapVoxelManipulator;
 class INodeDefManager;
-
+class Mapgen;
 
 v3s16 rand_ortho_dir(PseudoRandom &random, bool diagonal_dirs);
 v3s16 turn_xz(v3s16 olddir, int t);
@@ -44,6 +44,7 @@ struct DungeonParams {
 	content_t c_moss;
 	content_t c_stair;
 
+	int notifytype;
 	bool diagonal_dirs;
 	float mossratio;
 	v3s16 holesize;
@@ -56,13 +57,11 @@ struct DungeonParams {
 
 class DungeonGen {
 public:
+	ManualMapVoxelManipulator *vm;
+	Mapgen *mg;
 	u32 blockseed;
-	u64 mapseed;
-	ManualMapVoxelManipulator *vmanip;
-	INodeDefManager *ndef;
 	PseudoRandom random;
 	v3s16 csize;
-	s16 water_level;
 
 	content_t c_torch;
 	DungeonParams dp;
@@ -71,9 +70,8 @@ class DungeonGen {
 	v3s16 m_pos;
 	v3s16 m_dir;
 
-	DungeonGen(INodeDefManager *ndef, u64 seed, s16 waterlevel, DungeonParams *dparams);
-	void generate(ManualMapVoxelManipulator *vm, u32 bseed,
-		v3s16 full_node_min, v3s16 full_node_max);
+	DungeonGen(Mapgen *mg, DungeonParams *dparams);
+	void generate(u32 bseed, v3s16 full_node_min, v3s16 full_node_max);
 
 	void makeDungeon(v3s16 start_padding);
 	void makeRoom(v3s16 roomsize, v3s16 roomplace);

diff --git a/src/emerge.cpp b/src/emerge.cpp
@@ -105,8 +105,9 @@ EmergeManager::EmergeManager(IGameDef *gamedef) {
 	this->luaoverride_params_modified = 0;
 	this->luaoverride_flagmask        = 0;
 
-	mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
+	this->gennotify = 0;
 
+	mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
 
 	int nthreads;
 	if (g_settings->get("num_emerge_threads").empty()) {

diff --git a/src/emerge.h b/src/emerge.h
@@ -94,6 +94,8 @@ class EmergeManager : public IBackgroundBlockEmerger {
 	u16 qlimit_diskonly;
 	u16 qlimit_generate;
 
+	u32 gennotify;
+
 	MapgenParams *luaoverride_params;
 	u32 luaoverride_params_modified;
 	u32 luaoverride_flagmask;

diff --git a/src/mapgen.cpp b/src/mapgen.cpp
@@ -64,6 +64,16 @@ FlagDesc flagdesc_deco_schematic[] = {
 	{NULL,             0}
 };
 
+FlagDesc flagdesc_gennotify[] = {
+	{"dungeon",          1 << GENNOTIFY_DUNGEON},
+	{"temple",           1 << GENNOTIFY_TEMPLE},
+	{"cave_begin",       1 << GENNOTIFY_CAVE_BEGIN},
+	{"cave_end",         1 << GENNOTIFY_CAVE_END},
+	{"large_cave_begin", 1 << GENNOTIFY_LARGECAVE_BEGIN},
+	{"large_cave_end",   1 << GENNOTIFY_LARGECAVE_END},
+	{NULL,               0}
+};
+
 ///////////////////////////////////////////////////////////////////////////////
 
 
@@ -896,6 +906,15 @@ Mapgen::Mapgen() {
 	ndef        = NULL;
 	heightmap   = NULL;
 	biomemap    = NULL;
+
+	for (unsigned int i = 0; i != NUM_GEN_NOTIFY; i++)
+		gen_notifications[i] = new std::vector<v3s16>;
+}
+
+
+Mapgen::~Mapgen() {
+	for (unsigned int i = 0; i != NUM_GEN_NOTIFY; i++)
+		delete gen_notifications[i];
 }
 
 

diff --git a/src/mapgen.h b/src/mapgen.h
@@ -53,9 +53,16 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #define DECO_PLACE_CENTER_Y 2
 #define DECO_PLACE_CENTER_Z 4
 
+#define ORE_RANGE_ACTUAL 1
+#define ORE_RANGE_MIRROR 2
+
+#define NUM_GEN_NOTIFY 6
+
+
 extern FlagDesc flagdesc_mapgen[];
 extern FlagDesc flagdesc_ore[];
 extern FlagDesc flagdesc_deco_schematic[];
+extern FlagDesc flagdesc_gennotify[];
 
 class BiomeDefManager;
 class Biome;
@@ -67,6 +74,32 @@ struct BlockMakeData;
 class VoxelArea;
 class Map;
 
+
+enum MapgenObject {
+	MGOBJ_VMANIP,
+	MGOBJ_HEIGHTMAP,
+	MGOBJ_BIOMEMAP,
+	MGOBJ_HEATMAP,
+	MGOBJ_HUMIDMAP,
+	MGOBJ_GENNOTIFY
+};
+
+enum GenNotify {
+	GENNOTIFY_DUNGEON,
+	GENNOTIFY_TEMPLE,
+	GENNOTIFY_CAVE_BEGIN,
+	GENNOTIFY_CAVE_END,
+	GENNOTIFY_LARGECAVE_BEGIN,
+	GENNOTIFY_LARGECAVE_END
+};
+
+enum OreType {
+	ORE_SCATTER,
+	ORE_SHEET,
+	ORE_CLAYLIKE
+};
+
+
 struct MapgenParams {
 	std::string mg_name;
 	int chunksize;
@@ -100,8 +133,11 @@ class Mapgen {
 	u8 *biomemap;
 	v3s16 csize;
 
+	u32 gennotify;
+	std::vector<v3s16> *gen_notifications[NUM_GEN_NOTIFY];
+
 	Mapgen();
-	virtual ~Mapgen() {}
+	virtual ~Mapgen();
 
 	s16 findGroundLevelFull(v2s16 p2d);
 	s16 findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax);
@@ -123,23 +159,6 @@ struct MapgenFactory {
 	virtual ~MapgenFactory() {}
 };
 
-enum MapgenObject {
-	MGOBJ_VMANIP,
-	MGOBJ_HEIGHTMAP,
-	MGOBJ_BIOMEMAP,
-	MGOBJ_HEATMAP,
-	MGOBJ_HUMIDMAP
-};
-
-enum OreType {
-	ORE_SCATTER,
-	ORE_SHEET,
-	ORE_CLAYLIKE
-};
-
-#define ORE_RANGE_ACTUAL 1
-#define ORE_RANGE_MIRROR 2
-
 class Ore {
 public:
 	std::string ore_name;

diff --git a/src/mapgen_v6.cpp b/src/mapgen_v6.cpp
@@ -74,6 +74,7 @@ MapgenV6::MapgenV6(int mapgenid, MapgenV6Params *params, EmergeManager *emerge)
 	this->water_level = params->water_level;
 	this->flags   = params->flags;
 	this->csize   = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
+	this->gennotify = emerge->gennotify;
 
 	this->freq_desert = params->freq_desert;
 	this->freq_beach  = params->freq_beach;
@@ -456,22 +457,24 @@ void MapgenV6::makeChunk(BlockMakeData *data) {
 			dp.c_stair   = c_stair_cobble;
 
 			dp.diagonal_dirs = false;
-			dp.mossratio = 3.0;
-			dp.holesize  = v3s16(1, 2, 1);
-			dp.roomsize  = v3s16(0, 0, 0);
+			dp.mossratio  = 3.0;
+			dp.holesize   = v3s16(1, 2, 1);
+			dp.roomsize   = v3s16(0, 0, 0);
+			dp.notifytype = GENNOTIFY_DUNGEON;
 		} else {
 			dp.c_cobble  = c_sandbrick;
 			dp.c_moss    = c_sandbrick; // should make this 'cracked sandstone' later
 			dp.c_stair   = c_stair_sandstone;
 
 			dp.diagonal_dirs = true;
-			dp.mossratio = 0.0;
-			dp.holesize  = v3s16(2, 3, 2);
-			dp.roomsize  = v3s16(2, 5, 2);
+			dp.mossratio  = 0.0;
+			dp.holesize   = v3s16(2, 3, 2);
+			dp.roomsize   = v3s16(2, 5, 2);
+			dp.notifytype = GENNOTIFY_TEMPLE;
 		}
 
-		DungeonGen dgen(ndef, data->seed, water_level, &dp);
-		dgen.generate(vm, blockseed, full_node_min, full_node_max);
+		DungeonGen dgen(this, &dp);
+		dgen.generate(blockseed, full_node_min, full_node_max);
 	}
 
 	// Add top and bottom side of water to transforming_liquid queue

diff --git a/src/mapgen_v7.cpp b/src/mapgen_v7.cpp
@@ -73,6 +73,7 @@ MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge)
 	this->seed     = (int)params->seed;
 	this->water_level = params->water_level;
 	this->flags    = params->flags | MGV7_MOUNTAINS | MGV7_RIDGES;
+	this->gennotify = emerge->gennotify;
 
 	this->csize   = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
 
@@ -207,8 +208,8 @@ void MapgenV7::makeChunk(BlockMakeData *data) {
 		generateCaves(stone_surface_max_y);
 
 	if (flags & MG_DUNGEONS) {
-		DungeonGen dgen(ndef, data->seed, water_level, NULL);
-		dgen.generate(vm, blockseed, full_node_min, full_node_max);
+		DungeonGen dgen(this, NULL);
+		dgen.generate(blockseed, full_node_min, full_node_max);
 	}
 
 	for (size_t i = 0; i != emerge->decorations.size(); i++) {

diff --git a/src/script/lua_api/l_mapgen.cpp b/src/script/lua_api/l_mapgen.cpp
@@ -54,6 +54,7 @@ struct EnumString ModApiMapgen::es_MapgenObject[] =
 	{MGOBJ_BIOMEMAP,  "biomemap"},
 	{MGOBJ_HEATMAP,   "heatmap"},
 	{MGOBJ_HUMIDMAP,  "humiditymap"},
+	{MGOBJ_GENNOTIFY, "gennotify"},
 	{0, NULL},
 };
 
@@ -95,8 +96,6 @@ int ModApiMapgen::l_get_mapgen_object(lua_State *L)
 
 	size_t maplen = mg->csize.X * mg->csize.Z;
 
-	int nargs = 1;
-
 	switch (mgobj) {
 		case MGOBJ_VMANIP: {
 			ManualMapVoxelManipulator *vm = mg->vm;
@@ -113,9 +112,7 @@ int ModApiMapgen::l_get_mapgen_object(lua_State *L)
 			// emerged max pos
 			push_v3s16(L, vm->m_area.MaxEdge);
 
-			nargs = 3;
-
-			break; }
+			return 3; }
 		case MGOBJ_HEIGHTMAP: {
 			if (!mg->heightmap)
 				return 0;
@@ -125,7 +122,8 @@ int ModApiMapgen::l_get_mapgen_object(lua_State *L)
 				lua_pushinteger(L, mg->heightmap[i]);
 				lua_rawseti(L, -2, i + 1);
 			}
-			break; }
+
+			return 1; }
 		case MGOBJ_BIOMEMAP: {
 			if (!mg->biomemap)
 				return 0;
@@ -135,7 +133,8 @@ int ModApiMapgen::l_get_mapgen_object(lua_State *L)
 				lua_pushinteger(L, mg->biomemap[i]);
 				lua_rawseti(L, -2, i + 1);
 			}
-			break; }
+
+			return 1; }
 		case MGOBJ_HEATMAP: { // Mapgen V7 specific objects
 		case MGOBJ_HUMIDMAP:
 			if (strcmp(emerge->params->mg_name.c_str(), "v7"))
@@ -153,10 +152,32 @@ int ModApiMapgen::l_get_mapgen_object(lua_State *L)
 				lua_pushnumber(L, arr[i]);
 				lua_rawseti(L, -2, i + 1);
 			}
-			break; }
+
+			return 1; }
+		case MGOBJ_GENNOTIFY: {
+			lua_newtable(L);
+			for (int i = 0; flagdesc_gennotify[i].name; i++) {
+				if (!(emerge->gennotify & flagdesc_gennotify[i].flag))
+					continue;
+
+				std::vector<v3s16> *posvec = mg->gen_notifications[i];
+				if (!posvec)
+					return 0;
+
+				lua_newtable(L);
+				for (unsigned int j = 0; j != posvec->size(); j++) {
+					push_v3s16(L, (*posvec)[j]);
+					lua_rawseti(L, -2, j + 1);
+				}
+				lua_setfield(L, -2, flagdesc_gennotify[i].name);
+
+				posvec->clear();
+			}
+
+			return 1; }
 	}
 
-	return nargs;
+	return 0;
 }
 
 // minetest.set_mapgen_params(params)
@@ -214,6 +235,16 @@ int ModApiMapgen::l_set_mapgen_params(lua_State *L)
 	return 0;
 }
 
+// set_gen_notify(string)
+int ModApiMapgen::l_set_gen_notify(lua_State *L)
+{
+	if (lua_isstring(L, 1)) {
+		EmergeManager *emerge = getServer(L)->getEmergeManager();
+		emerge->gennotify = readFlagString(lua_tostring(L, 1), flagdesc_gennotify);
+	}
+	return 0;
+}
+
 // register_biome({lots of stuff})
 int ModApiMapgen::l_register_biome(lua_State *L)
 {
@@ -581,6 +612,7 @@ void ModApiMapgen::Initialize(lua_State *L, int top)
 	API_FCT(get_mapgen_object);
 
 	API_FCT(set_mapgen_params);
+	API_FCT(set_gen_notify);
 
 	API_FCT(register_biome);
 	API_FCT(register_decoration);

diff --git a/src/script/lua_api/l_mapgen.h b/src/script/lua_api/l_mapgen.h
@@ -32,6 +32,9 @@ class ModApiMapgen : public ModApiBase {
 	// set mapgen parameters
 	static int l_set_mapgen_params(lua_State *L);
 
+	// set_gen_notify(flagstring)
+	static int l_set_gen_notify(lua_State *L);
+
 	// register_biome({lots of stuff})
 	static int l_register_biome(lua_State *L);