diff --git a/src/emerge.cpp b/src/emerge.cpp
index ee6650f9c..ac654f368 100644
--- a/src/emerge.cpp
+++ b/src/emerge.cpp
@@ -48,6 +48,8 @@ EmergeManager::EmergeManager(IGameDef *gamedef, BiomeDefManager *bdef) {
 	this->biomedef = bdef ? bdef : new BiomeDefManager(gamedef);
 	this->params   = NULL;
 	
+	mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
+	
 	qlimit_total    = g_settings->getU16("emergequeue_limit_total");
 	qlimit_diskonly = g_settings->getU16("emergequeue_limit_diskonly");
 	qlimit_generate = g_settings->getU16("emergequeue_limit_generate");
@@ -209,7 +211,7 @@ u32 EmergeManager::getBlockSeed(v3s16 p) {
 	return (u32)(params->seed & 0xFFFFFFFF) +
 		p.Z * 38134234 +
 		p.Y * 42123 +
-		p.Y * 23;
+		p.X * 23;
 }
 
 
@@ -331,10 +333,6 @@ private:
 
 #if 1
 
-#define EMERGE_DBG_OUT(x) \
-	{ if (enable_mapgen_debug_info) \
-	infostream << "EmergeThread: " x << std::endl; }
-
 bool EmergeThread::getBlockOrStartGen(v3s16 p, MapBlock **b, 
 									BlockMakeData *data, bool allow_gen) {
 	v2s16 p2d(p.X, p.Z);
@@ -356,8 +354,8 @@ bool EmergeThread::getBlockOrStartGen(v3s16 p, MapBlock **b,
 	// start generation inside this same envlock
 	if (allow_gen && (block == NULL || !block->isGenerated())) {
 		EMERGE_DBG_OUT("generating");
-		map->initBlockMake(data, p);
-		return true;
+		*b = block;
+		return map->initBlockMake(data, p);
 	}
 	
 	*b = block;
@@ -377,14 +375,14 @@ void *EmergeThread::Thread() {
 	
 	map    = (ServerMap *)&(m_server->m_env->getMap());
 	emerge = m_server->m_emerge;
-	mapgen = emerge->mapgen[id]; //emerge->getMapgen();
+	mapgen = emerge->mapgen[id];
+	enable_mapgen_debug_info = emerge->mapgen_debug_info;
 	
 	while (getRun())
 	try {
-		while (!popBlockEmerge(&p, &flags)) {
+		if (!popBlockEmerge(&p, &flags)) {
 			qevent.wait();
-			if (!getRun())
-				goto exit_emerge_loop;
+			continue;
 		}
 
 		last_tried_pos = p;
@@ -489,7 +487,6 @@ void *EmergeThread::Thread() {
 	}
 	
 	END_DEBUG_EXCEPTION_HANDLER(errorstream)
-exit_emerge_loop:
 	log_deregister_thread();
 	return NULL;
 }
diff --git a/src/emerge.h b/src/emerge.h
index 7e0cc4850..e5014df58 100644
--- a/src/emerge.h
+++ b/src/emerge.h
@@ -7,6 +7,10 @@
 
 #define BLOCK_EMERGE_ALLOWGEN (1<<0)
 
+#define EMERGE_DBG_OUT(x) \
+	{ if (enable_mapgen_debug_info) \
+	infostream << "EmergeThread: " x << std::endl; }
+
 class Mapgen;
 class MapgenParams;
 class MapgenFactory;
@@ -18,7 +22,6 @@ class ManualMapVoxelManipulator;
 #include "server.h"
 
 struct BlockMakeData {
-	bool no_op;
 	ManualMapVoxelManipulator *vmanip;
 	u64 seed;
 	v3s16 blockpos_min;
@@ -28,7 +31,6 @@ struct BlockMakeData {
 	INodeDefManager *nodedef;
 
 	BlockMakeData():
-		no_op(false),
 		vmanip(NULL),
 		seed(0),
 		nodedef(NULL)
@@ -51,6 +53,7 @@ public:
 	
 	//settings
 	MapgenParams *params;
+	bool mapgen_debug_info;
 	u16 qlimit_total;
 	u16 qlimit_diskonly;
 	u16 qlimit_generate;
@@ -104,7 +107,6 @@ public:
 		mapgen(NULL),
 		id(ethreadid)
 	{
-		enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
 	}
 
 	void *Thread();
diff --git a/src/map.cpp b/src/map.cpp
index a8928d864..3f2f8d1d3 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -2143,14 +2143,10 @@ ServerMap::~ServerMap()
 #endif
 }
 
-void ServerMap::initBlockMake(BlockMakeData *data, v3s16 blockpos)
+bool ServerMap::initBlockMake(BlockMakeData *data, v3s16 blockpos)
 {
-	bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
-	if(enable_mapgen_debug_info)
-		infostream<<"initBlockMake(): "
-				<<"("<<blockpos.X<<","<<blockpos.Y<<","<<blockpos.Z<<") - "
-				<<"("<<blockpos.X<<","<<blockpos.Y<<","<<blockpos.Z<<")"
-				<<std::endl;
+	bool enable_mapgen_debug_info = m_emerge->mapgen_debug_info;
+	EMERGE_DBG_OUT("initBlockMake(): " PP(blockpos) " - " PP(blockpos));
 
 	//s16 chunksize = 3;
 	//v3s16 chunk_offset(-1,-1,-1);
@@ -2170,12 +2166,8 @@ void ServerMap::initBlockMake(BlockMakeData *data, v3s16 blockpos)
 	// Do nothing if not inside limits (+-1 because of neighbors)
 	if(blockpos_over_limit(blockpos_min - extra_borders) ||
 		blockpos_over_limit(blockpos_max + extra_borders))
-	{
-		data->no_op = true;
-		return;
-	}
+		return false;
 
-	data->no_op = false;
 	data->seed = m_seed;
 	data->blockpos_min = blockpos_min;
 	data->blockpos_max = blockpos_max;
@@ -2263,6 +2255,7 @@ void ServerMap::initBlockMake(BlockMakeData *data, v3s16 blockpos)
 	}
 
 	// Data is ready now.
+	return true;
 }
 
 MapBlock* ServerMap::finishBlockMake(BlockMakeData *data,
@@ -2277,13 +2270,7 @@ MapBlock* ServerMap::finishBlockMake(BlockMakeData *data,
 
 	v3s16 extra_borders(1,1,1);
 
-	if(data->no_op)
-	{
-		//infostream<<"finishBlockMake(): no-op"<<std::endl;
-		return NULL;
-	}
-
-	bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
+	bool enable_mapgen_debug_info = m_emerge->mapgen_debug_info;
 
 	/*infostream<<"Resulting vmanip:"<<std::endl;
 	data->vmanip.print(infostream);*/
@@ -2311,9 +2298,7 @@ MapBlock* ServerMap::finishBlockMake(BlockMakeData *data,
 		data->vmanip->blitBackAll(&changed_blocks);
 	}
 
-	if(enable_mapgen_debug_info)
-		infostream<<"finishBlockMake: changed_blocks.size()="
-				<<changed_blocks.size()<<std::endl;
+	EMERGE_DBG_OUT("finishBlockMake: changed_blocks.size()=" << changed_blocks.size());
 
 	/*
 		Copy transforming liquid information
diff --git a/src/map.h b/src/map.h
index 1062f8301..1d25b636b 100644
--- a/src/map.h
+++ b/src/map.h
@@ -379,7 +379,7 @@ public:
 	/*
 		Blocks are generated by using these and makeBlock().
 	*/
-	void initBlockMake(BlockMakeData *data, v3s16 blockpos);
+	bool initBlockMake(BlockMakeData *data, v3s16 blockpos);
 	MapBlock *finishBlockMake(BlockMakeData *data,
 			core::map<v3s16, MapBlock*> &changed_blocks);
 
diff --git a/src/mapgen_v6.cpp b/src/mapgen_v6.cpp
index ef2cf5f52..d5405876e 100644
--- a/src/mapgen_v6.cpp
+++ b/src/mapgen_v6.cpp
@@ -432,12 +432,6 @@ int MapgenV6::getGroundLevelAtPoint(v2s16 p) {
 
 void MapgenV6::makeChunk(BlockMakeData *data)
 {
-	if(data->no_op)
-	{
-		//dstream<<"makeBlock: no-op"<<std::endl;
-		return;
-	}
-
 	this->generating = true;
 
 	assert(data->vmanip);
@@ -1436,4 +1430,5 @@ void MapgenV6::makeChunk(BlockMakeData *data)
 		vmanip.spreadLight(bank, light_sources, ndef);
 	}
 	}
+	this->generating = false;
 }