diff --git a/core/src/io/anuke/mindustry/Renderer.java b/core/src/io/anuke/mindustry/Renderer.java
index 6496823282..4ecb4b90dc 100644
--- a/core/src/io/anuke/mindustry/Renderer.java
+++ b/core/src/io/anuke/mindustry/Renderer.java
@@ -181,7 +181,7 @@ public class Renderer extends RendererModule{
 					if(World.tile(worldx, worldy) != null){
 						Tile tile = World.tile(worldx, worldy);
 						if(l == 0){
-							if(tile.block() != Blocks.air){
+							if(tile.block() != Blocks.air && World.isAccessible(worldx, worldy)){
 								Draw.rect(tile.block().shadow, worldx * tilesize, worldy * tilesize);
 							}
 						}else if(l == 1){
diff --git a/core/src/io/anuke/mindustry/world/World.java b/core/src/io/anuke/mindustry/world/World.java
index cdb1d815e7..7a7317e2da 100644
--- a/core/src/io/anuke/mindustry/world/World.java
+++ b/core/src/io/anuke/mindustry/world/World.java
@@ -41,6 +41,15 @@ public class World{
 		return tile == null || tile.block().solid || (tile.floor().solid && (tile.block() == Blocks.air));
 	}
 	
+	public static boolean wallSolid(int x, int y){
+		Tile tile = tile(x, y);
+		return tile == null || tile.block().solid;
+	}
+	
+	public static boolean isAccessible(int x, int y){
+		return !wallSolid(x, y-1) || !wallSolid(x, y+1) || !wallSolid(x-1, y) ||!wallSolid(x+1, y);
+	}
+	
 	public static int getMap(){
 		return currentMap;
 	}
diff --git a/core/src/io/anuke/mindustry/world/blocks/ProductionBlocks.java b/core/src/io/anuke/mindustry/world/blocks/ProductionBlocks.java
index e2cce7aca2..c9e75ba886 100644
--- a/core/src/io/anuke/mindustry/world/blocks/ProductionBlocks.java
+++ b/core/src/io/anuke/mindustry/world/blocks/ProductionBlocks.java
@@ -117,9 +117,12 @@ public class ProductionBlocks{
 		{
 			formalName = "coal extractor";
 			input = Item.stone;
+			inputAmount = 5;
 			inputLiquid = Liquid.water;
+			liquidAmount = 19.99f;
 			output = Item.coal;
 			health = 50;
+			purifyTime = 80;
 		}
 		
 		@Override
diff --git a/core/src/io/anuke/mindustry/world/blocks/types/Purifier.java b/core/src/io/anuke/mindustry/world/blocks/types/Purifier.java
index d6e7bba2c6..a2b431f003 100644
--- a/core/src/io/anuke/mindustry/world/blocks/types/Purifier.java
+++ b/core/src/io/anuke/mindustry/world/blocks/types/Purifier.java
@@ -17,7 +17,7 @@ public class Purifier extends Conduit{
 	public Liquid inputLiquid = null;
 	public float liquidAmount = 19.99f;
 	public Item output = null;
-	public int itemCapacity = 100;
+	public int itemCapacity = 90;
 	public int purifyTime = 80;
 
 	public Purifier(String name) {