diff --git a/client/src/main/java/client/Client.java b/client/src/main/java/client/Client.java
index ca0a0c5e..cc0f5b93 100755
--- a/client/src/main/java/client/Client.java
+++ b/client/src/main/java/client/Client.java
@@ -2578,11 +2578,12 @@ public class Client implements IThreadListener {
 		    		Client.this.open.init();
 			}
 		});
-    	this.registerDebug(Keysym.L, "Maximale Helligkeit umschalten", new DebugRunner() {
-			public void execute(Keysym key) {
-				Client.this.logFeed("Maximale Helligkeit: %s", (Client.this.setGamma ^= true) ? "an" : "aus");
-			}
-		});
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.L, "Maximale Helligkeit umschalten", new DebugRunner() {
+				public void execute(Keysym key) {
+					Client.this.logFeed("Maximale Helligkeit: %s", (Client.this.setGamma ^= true) ? "an" : "aus");
+				}
+			});
     	this.registerDebug(Keysym.J, "JVM GC ausführen", new DebugRunner() {
 			public void execute(Keysym key) {
 				Client.this.logFeed("Führe JVM GC aus");
@@ -2594,34 +2595,38 @@ public class Client implements IThreadListener {
 	            Client.this.logFeed("JVM GC ausgeführt: %d MB freigegeben", (int)(mem / 1024L / 1024L));
 			}
 		});
-    	this.registerDebug(Keysym.B, "Hitbox-Overlay umschalten", new DebugRunner() {
-			public void execute(Keysym key) {
-				Client.this.getRenderManager().setDebugBoundingBox(!Client.this.getRenderManager().isDebugBoundingBox());
-				Client.this.logFeed("Objekt-Grenzen: %s", Client.this.getRenderManager().isDebugBoundingBox() ? "an" : "aus");
-			}
-		});
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.B, "Hitbox-Overlay umschalten", new DebugRunner() {
+				public void execute(Keysym key) {
+					Client.this.getRenderManager().setDebugBoundingBox(!Client.this.getRenderManager().isDebugBoundingBox());
+					Client.this.logFeed("Objekt-Grenzen: %s", Client.this.getRenderManager().isDebugBoundingBox() ? "an" : "aus");
+				}
+			});
     	this.registerDebug(Keysym.K, "Debug-Kamera in 3. Person umschalten", new DebugRunner() {
 			public void execute(Keysym key) {
 				Client.this.logFeed("Debug-Kamera 3. Person: %s", (Client.this.debugCamEnable ^= true) ? "an" : "aus");
 			}
 		});
-    	this.registerDebug(Keysym.X, "Röntgenblick umschalten", new DebugRunner() {
-			public void execute(Keysym key) {
-				Client.this.xrayActive ^= true;
-				Client.this.renderGlobal.loadRenderers();
-				Client.this.logFeed("Röntgenblick: %s", Client.this.xrayActive ? "an" : "aus");
-			}
-		});
-    	this.registerDebug(Keysym.O, "Objekt-Overlay umschalten", new DebugRunner() {
-			public void execute(Keysym key) {
-				Client.this.logFeed("Objekt-Umrahmung: %s", (Client.this.renderOutlines ^= true) ? "an" : "aus");
-			}
-		});
-    	this.registerDebug(Keysym.I, "Block-Objekt-Overlay umschalten", new DebugRunner() {
-			public void execute(Keysym key) {
-				Client.this.logFeed("Block-Objekte anzeigen: %s", (Client.this.tileOverlay ^= true) ? "an" : "aus");
-			}
-		});
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.X, "Röntgenblick umschalten", new DebugRunner() {
+				public void execute(Keysym key) {
+					Client.this.xrayActive ^= true;
+					Client.this.renderGlobal.loadRenderers();
+					Client.this.logFeed("Röntgenblick: %s", Client.this.xrayActive ? "an" : "aus");
+				}
+			});
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.O, "Objekt-Overlay umschalten", new DebugRunner() {
+				public void execute(Keysym key) {
+					Client.this.logFeed("Objekt-Umrahmung: %s", (Client.this.renderOutlines ^= true) ? "an" : "aus");
+				}
+			});
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.I, "Block-Objekt-Overlay umschalten", new DebugRunner() {
+				public void execute(Keysym key) {
+					Client.this.logFeed("Block-Objekte anzeigen: %s", (Client.this.tileOverlay ^= true) ? "an" : "aus");
+				}
+			});
     	this.registerDebug(Keysym.Y, "Alle Chunks neu kompilieren", new DebugRunner() {
 			public void execute(Keysym key) {
 				Client.this.logFeed("Kompiliere alle Chunks neu");
@@ -2643,11 +2648,12 @@ public class Client implements IThreadListener {
 				Client.this.logFeed("Sounds wurden neu geladen");
 			}
 		});
-    	this.registerDebug(Keysym.W, "Server-Tick-Limit umschalten (Welt beschleunigen / Warpmodus)", new DebugRunner() {
-			public void execute(Keysym key) {
-				Client.this.performAction(Action.WARP_MODE);
-			}
-		});
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.W, "Server-Tick-Limit umschalten (Welt beschleunigen / Warpmodus)", new DebugRunner() {
+				public void execute(Keysym key) {
+					Client.this.performAction(Action.WARP_MODE);
+				}
+			});
     	this.registerDebug(Keysym.M, "Alle Gegenstände herbei ziehen (Magnetmodus)", new DebugRunner() {
 			public void execute(Keysym key) {
 				Client.this.performAction(Action.MAGNET);
@@ -2658,34 +2664,37 @@ public class Client implements IThreadListener {
 				Client.this.performAction(Action.HEAL);
 			}
 		});
-    	this.registerDebug(Keysym.P, "Server Performance-Anfrage senden", new DebugRunner() {
-			public void execute(Keysym key) {
-				Client.this.performAction(Action.PERF);
-			}
-		});
-    	this.registerDebug(Keysym.C, "Debug-Crash auslösen (2x schnell hintereinander)", new DebugRunner() {
-    		long lastUsed;
-    		
-			public void execute(Keysym key) {
-				if(System.currentTimeMillis() - this.lastUsed <= 1000L) {
-					throw new RuntimeException("Manuell herbeigerufener Debugging-Absturz");
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.P, "Server Performance-Anfrage senden", new DebugRunner() {
+				public void execute(Keysym key) {
+					Client.this.performAction(Action.PERF);
 				}
-				else {
-					this.lastUsed = System.currentTimeMillis();
-					Client.this.logFeed(TextColor.RED + "VORSICHT: Debug-Absturz nach mehrmaligem Drücken innerhalb einer Sekunde");
+			});
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.C, "Debug-Crash auslösen (2x schnell hintereinander)", new DebugRunner() {
+	    		long lastUsed;
+	    		
+				public void execute(Keysym key) {
+					if(System.currentTimeMillis() - this.lastUsed <= 1000L) {
+						throw new RuntimeException("Manuell herbeigerufener Debugging-Absturz");
+					}
+					else {
+						this.lastUsed = System.currentTimeMillis();
+						Client.this.logFeed(TextColor.RED + "VORSICHT: Debug-Absturz nach mehrmaligem Drücken innerhalb einer Sekunde");
+					}
 				}
-			}
-		});
+			});
     	this.registerDebug(Keysym.V, "Alle Sounds stoppen", new DebugRunner() {
 			public void execute(Keysym key) {
 				Client.this.soundManager.stopSounds();
 			}
 		});
-    	this.registerDebug(Keysym.Q, "Programm sofort beenden und trennen", new DebugRunner() {
-			public void execute(Keysym key) {
-				Client.this.interrupted = true;
-			}
-		});
+    	if(Util.DEVMODE)
+	    	this.registerDebug(Keysym.Q, "Programm sofort beenden und trennen", new DebugRunner() {
+				public void execute(Keysym key) {
+					Client.this.interrupted = true;
+				}
+			});
     	this.registerDebug(Keysym.A, "Bild-Synchonisation umschalten (VSync - begrenzt - unbegrenzt)", new DebugRunner() {
 			public void execute(Keysym key) {
 				Client.this.getVar("win_sync").parse("" + (Client.this.vsync ? Client.this.syncLimit : (Client.this.syncLimited ? -1 : 0)));
diff --git a/client/src/main/java/client/world/ChunkEmpty.java b/client/src/main/java/client/world/ChunkEmpty.java
index 54764f9b..8333ada0 100755
--- a/client/src/main/java/client/world/ChunkEmpty.java
+++ b/client/src/main/java/client/world/ChunkEmpty.java
@@ -5,6 +5,7 @@ import java.util.function.Predicate;
 
 import common.biome.Biome;
 import common.block.Block;
+import common.block.natural.BlockFire;
 import common.collect.Lists;
 import common.entity.Entity;
 import common.init.BlockRegistry;
@@ -30,7 +31,10 @@ public class ChunkEmpty extends ChunkClient {
 	
 	static {
 		for(Block block : BlockRegistry.blocks()) {
-			STATES.addAll(block.getValidStates());
+			if(block instanceof BlockFire)
+				STATES.add(block.getState());
+			else
+				STATES.addAll(block.getValidStates());
 		}
 		XSTRETCH = ExtMath.ceilf(ExtMath.sqrtf((float)STATES.size()));
 		ZSTRETCH = ExtMath.ceilf((float)STATES.size() / (float)XSTRETCH);
diff --git a/client/src/main/resources/textures/blocks/concrete.png b/client/src/main/resources/textures/blocks/concrete.png
index 84ce3ee3..62092af5 100755
Binary files a/client/src/main/resources/textures/blocks/concrete.png and b/client/src/main/resources/textures/blocks/concrete.png differ