diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/painters/RegularPainter.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/painters/RegularPainter.java
index a4b6b8907..741649340 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/painters/RegularPainter.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/painters/RegularPainter.java
@@ -306,7 +306,7 @@ public abstract class RegularPainter extends Painter {
 			}
 
 			if (merge.height() >= 3) {
-				Painter.fill(l, merge.left, merge.top + 1, 1, merge.height()-1, mergeTerrain);
+				r.merge(l, n, new Rect(merge.left, merge.top + 1, merge.left+1, merge.bottom), mergeTerrain);
 				return true;
 			} else {
 				return false;
@@ -330,7 +330,7 @@ public abstract class RegularPainter extends Painter {
 			}
 
 			if (merge.width() >= 3) {
-				Painter.fill(l, merge.left + 1, merge.top, merge.width()-1, 1, mergeTerrain);
+				r.merge(l, n, new Rect(merge.left + 1, merge.top, merge.right, merge.top+1), mergeTerrain);
 				return true;
 			} else {
 				return false;
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/Room.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/Room.java
index 804a21962..79be28ae3 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/Room.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/Room.java
@@ -22,6 +22,7 @@
 package com.shatteredpixel.shatteredpixeldungeon.levels.rooms;
 
 import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
+import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.watabou.utils.Bundlable;
 import com.watabou.utils.Bundle;
 import com.watabou.utils.Graph;
@@ -241,6 +242,11 @@ public abstract class Room extends Rect implements Graph.Node, Bundlable {
 	public boolean canMerge(Level l, Point p, int mergeTerrain){
 		return false;
 	}
+
+	//can be overriden for special merge logic between rooms
+	public void merge(Level l, Room other, Rect merge, int mergeTerrain){
+		Painter.fill(l, merge, mergeTerrain);
+	}
 	
 	public boolean addNeigbour( Room other ) {
 		if (neigbours.contains(other))
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/ChasmRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/ChasmRoom.java
index ecaa1af44..b17a5aa56 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/ChasmRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/ChasmRoom.java
@@ -25,6 +25,7 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
+import com.watabou.utils.Rect;
 
 public class ChasmRoom extends PatchRoom {
 
@@ -33,6 +34,17 @@ public class ChasmRoom extends PatchRoom {
 		return new float[]{4, 2, 1};
 	}
 
+	@Override
+	public void merge(Level l, Room other, Rect merge, int mergeTerrain) {
+		if (mergeTerrain == Terrain.EMPTY
+				&& (other instanceof ChasmRoom || other instanceof PlatformRoom)){
+			super.merge(l, other, merge, Terrain.CHASM);
+			Painter.set(l, connected.get(other), Terrain.EMPTY);
+		} else {
+			super.merge(l, other, merge, mergeTerrain);
+		}
+	}
+
 	@Override
 	public void paint(Level level) {
 		Painter.fill( level, this, Terrain.WALL );
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/GrassyGraveRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/GrassyGraveRoom.java
index 63b77e0bf..6639c52a6 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/GrassyGraveRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/GrassyGraveRoom.java
@@ -27,9 +27,21 @@ import com.shatteredpixel.shatteredpixeldungeon.items.Heap;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
 import com.watabou.utils.Random;
+import com.watabou.utils.Rect;
 
 public class GrassyGraveRoom extends StandardRoom {
+
+	@Override
+	public void merge(Level l, Room other, Rect merge, int mergeTerrain) {
+		if (mergeTerrain == Terrain.EMPTY &&
+				(other instanceof GrassyGraveRoom || other instanceof PlantsRoom)){
+			super.merge(l, other, merge, Terrain.GRASS);
+		} else {
+			super.merge(l, other, merge, mergeTerrain);
+		}
+	}
 	
 	@Override
 	public void paint(Level level) {
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/PlantsRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/PlantsRoom.java
index 23f7cc078..476252816 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/PlantsRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/PlantsRoom.java
@@ -25,10 +25,12 @@ import com.shatteredpixel.shatteredpixeldungeon.items.Generator;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
 import com.shatteredpixel.shatteredpixeldungeon.plants.Firebloom;
 import com.shatteredpixel.shatteredpixeldungeon.plants.Plant;
 import com.watabou.utils.Point;
 import com.watabou.utils.Random;
+import com.watabou.utils.Rect;
 
 public class PlantsRoom extends StandardRoom {
 	
@@ -47,6 +49,16 @@ public class PlantsRoom extends StandardRoom {
 		return new float[]{3, 1, 0};
 	}
 	
+	@Override
+	public void merge(Level l, Room other, Rect merge, int mergeTerrain) {
+		if (mergeTerrain == Terrain.EMPTY &&
+				(other instanceof PlantsRoom || other instanceof GrassyGraveRoom)){
+			super.merge(l, other, merge, Terrain.GRASS);
+		} else {
+			super.merge(l, other, merge, mergeTerrain);
+		}
+	}
+
 	@Override
 	public void paint(Level level) {
 		Painter.fill( level, this, Terrain.WALL );
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/PlatformRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/PlatformRoom.java
index 8917f9402..71baf8748 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/PlatformRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/PlatformRoom.java
@@ -24,6 +24,8 @@ package com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
+import com.watabou.utils.Point;
 import com.watabou.utils.Random;
 import com.watabou.utils.Rect;
 
@@ -46,6 +48,17 @@ public class PlatformRoom extends StandardRoom {
 		return new float[]{6, 3, 1};
 	}
 	
+	@Override
+	public void merge(Level l, Room other, Rect merge, int mergeTerrain) {
+		if (mergeTerrain != Terrain.CHASM
+				&& (other instanceof PlatformRoom || other instanceof ChasmRoom)){
+			super.merge(l, other, merge, Terrain.CHASM);
+			Painter.set(l, connected.get(other), Terrain.EMPTY_SP);
+		} else {
+			super.merge(l, other, merge, mergeTerrain);
+		}
+	}
+
 	@Override
 	public void paint(Level level) {
 		
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/StandardRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/StandardRoom.java
index b4205f924..234da0b9b 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/StandardRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/StandardRoom.java
@@ -149,7 +149,7 @@ public abstract class StandardRoom extends Room {
 	private static float[][] chances = new float[27][];
 	static {
 		chances[1] =  new float[]{10,  10,10,5, 0,0,0, 0,0,0, 0,0,0, 0,0,0,  1,0,1,0,1,0,1,1,0,0};
-		chances[2] =  new float[]{10,  10,10,5, 0,0,0, 0,0,0, 0,0,0, 0,0,0,  1,1,1,1,1,1,1,1,1,1};
+		chances[2] =  new float[]{10,  10,10,5, 0,0,0, 0,0,0, 0,0,0, 0,1000,0,  1,1,1000,1,1,1,1,1,1,1};
 		chances[4] =  chances[3] = chances[2];
 		chances[5] =  new float[]{10,  10,10,0, 0,0,0, 0,0,0, 0,0,0, 0,0,0,  0,0,0,0,0,0,0,0,0,0};
 
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/StripedRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/StripedRoom.java
index 086685e7c..84e1b82bb 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/StripedRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/StripedRoom.java
@@ -24,7 +24,9 @@ package com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
 import com.watabou.utils.Random;
+import com.watabou.utils.Rect;
 
 public class StripedRoom extends StandardRoom {
 	
@@ -33,6 +35,16 @@ public class StripedRoom extends StandardRoom {
 		return new float[]{2, 1, 0};
 	}
 	
+	@Override
+	public void merge(Level l, Room other, Rect merge, int mergeTerrain) {
+		if (other instanceof StripedRoom && mergeTerrain == Terrain.EMPTY){
+			super.merge(l, other, merge, Terrain.EMPTY_SP);
+		} else {
+			super.merge(l, other, merge, mergeTerrain);
+		}
+
+	}
+
 	@Override
 	public void paint(Level level) {
 		Painter.fill( level, this, Terrain.WALL );