diff --git a/core/assets/maps/canyon.png b/core/assets/maps/canyon.png
index b46ec157f1..3b9d43316c 100644
Binary files a/core/assets/maps/canyon.png and b/core/assets/maps/canyon.png differ
diff --git a/core/assets/maps/delta.png b/core/assets/maps/delta.png
index a1dde73f17..ef5a6eafbd 100644
Binary files a/core/assets/maps/delta.png and b/core/assets/maps/delta.png differ
diff --git a/core/assets/maps/maze.png b/core/assets/maps/maze.png
index eda20911bd..82684d1761 100644
Binary files a/core/assets/maps/maze.png and b/core/assets/maps/maze.png differ
diff --git a/core/assets/maps/pit.png b/core/assets/maps/pit.png
index fb4db8e271..58cc2fcc29 100644
Binary files a/core/assets/maps/pit.png and b/core/assets/maps/pit.png differ
diff --git a/core/assets/ui/out/icon-defense.png b/core/assets/ui/out/icon-defense.png
index d879ca6c44..003074bc56 100644
Binary files a/core/assets/ui/out/icon-defense.png and b/core/assets/ui/out/icon-defense.png differ
diff --git a/core/assets/ui/uiskin.png b/core/assets/ui/uiskin.png
index 150b81fb3b..dd65603f7f 100644
Binary files a/core/assets/ui/uiskin.png and b/core/assets/ui/uiskin.png differ
diff --git a/core/src/io/anuke/mindustry/EffectLoader.java b/core/src/io/anuke/mindustry/EffectLoader.java
index 55519fe7f6..3317c25dea 100644
--- a/core/src/io/anuke/mindustry/EffectLoader.java
+++ b/core/src/io/anuke/mindustry/EffectLoader.java
@@ -83,6 +83,13 @@ public class EffectLoader{
 			Draw.reset();
 		});
 		
+		Effect.create("smoke", 100, e -> {
+			Draw.color(Color.GRAY, new Color(0.3f, 0.3f, 0.3f, 1f), e.ifract());
+			float size = 7f-e.ifract()*7f;
+			Draw.rect("circle", e.x, e.y, size, size);
+			Draw.reset();
+		});
+		
 		Effect.create("spawn", 23, e -> {
 			Draw.thickness(2f);
 			Draw.color(Hue.mix(Color.DARK_GRAY, Color.SCARLET, e.ifract()));
diff --git a/core/src/io/anuke/mindustry/ai/PassTileGraph.java b/core/src/io/anuke/mindustry/ai/PassTileGraph.java
index 61a998b840..1c675c757d 100644
--- a/core/src/io/anuke/mindustry/ai/PassTileGraph.java
+++ b/core/src/io/anuke/mindustry/ai/PassTileGraph.java
@@ -15,11 +15,11 @@ public class PassTileGraph implements IndexedGraph<Tile>{
 	public Array<Connection<Tile>> getConnections(Tile fromNode){
 		tempConnections.clear();
 		
-		if(fromNode.block().solid && !fromNode.block().update)
+		if(!fromNode.passable())
 			return tempConnections;
 		
 		for(Tile tile : fromNode.getNearby()){
-			if(tile != null && (!tile.block().solid || tile.block().update))
+			if(tile != null && (tile.passable()))
 				tempConnections.add(new TileConnection(fromNode, tile));
 		}
 		
diff --git a/core/src/io/anuke/mindustry/entities/TileEntity.java b/core/src/io/anuke/mindustry/entities/TileEntity.java
index d898116c10..71a8a56c82 100644
--- a/core/src/io/anuke/mindustry/entities/TileEntity.java
+++ b/core/src/io/anuke/mindustry/entities/TileEntity.java
@@ -9,6 +9,7 @@ import io.anuke.mindustry.world.blocks.Blocks;
 import io.anuke.mindustry.world.blocks.ProductionBlocks;
 import io.anuke.ucore.core.Effects;
 import io.anuke.ucore.entities.Entity;
+import io.anuke.ucore.util.Mathf;
 
 public class TileEntity extends Entity{
 	public Tile tile;
@@ -54,6 +55,12 @@ public class TileEntity extends Entity{
 	
 	@Override
 	public void update(){
+		if(health != 0 && !tile.block().name().contains("block") &&
+				Mathf.chance(0.009f*delta*(1f-(float)health/maxhealth))){
+			
+			Effects.effect("smoke", x+Mathf.range(4), y+Mathf.range(4));
+		}
+		
 		tile.block().update(tile);
 	}
 	
diff --git a/core/src/io/anuke/mindustry/ui/LevelDialog.java b/core/src/io/anuke/mindustry/ui/LevelDialog.java
index e88b7bb6b4..14993c0a88 100644
--- a/core/src/io/anuke/mindustry/ui/LevelDialog.java
+++ b/core/src/io/anuke/mindustry/ui/LevelDialog.java
@@ -46,7 +46,7 @@ public class LevelDialog extends Dialog{
 			image.clicked(()->{
 				selectedMap = index;
 			});
-			image.getImageCell().size(150, 150);
+			image.getImageCell().size(164);
 			content().add(image).size(180);
 		}
 		
diff --git a/core/src/io/anuke/mindustry/world/Generator.java b/core/src/io/anuke/mindustry/world/Generator.java
index 5f23cf9a24..17d758659e 100644
--- a/core/src/io/anuke/mindustry/world/Generator.java
+++ b/core/src/io/anuke/mindustry/world/Generator.java
@@ -24,6 +24,7 @@ public class Generator{
 		Hue.rgb(80, 110, 180), Blocks.water,
 		Hue.rgb(70, 90, 150), Blocks.deepwater,
 		Hue.rgb(110, 80, 30), Blocks.dirt,
+		Hue.rgb(160, 120, 70), Blocks.dirtblock,
 		Hue.rgb(100, 100, 100), Blocks.stoneblock
 	);
 	
@@ -50,6 +51,7 @@ public class Generator{
 					core = tiles[x][y];
 				}else if(color == spawn){
 					spawnpoints.add(tiles[x][y]);
+					floor = Blocks.dirt;
 				}else{
 					if(Mathf.chance(0.02)){
 						block = Mathf.choose(Blocks.rock, Blocks.rock2);
diff --git a/core/src/io/anuke/mindustry/world/Tile.java b/core/src/io/anuke/mindustry/world/Tile.java
index 8a48f8c95b..666377b308 100644
--- a/core/src/io/anuke/mindustry/world/Tile.java
+++ b/core/src/io/anuke/mindustry/world/Tile.java
@@ -64,6 +64,14 @@ public class Tile{
 		this.floor = type;
 	}
 	
+	public boolean passable(){
+		return !(floor.solid || (block.solid && !block.update));
+	}
+	
+	public boolean solid(){
+		return block.solid || floor.solid;
+	}
+	
 	public boolean breakable(){
 		return block.update || block.breakable;
 	}