diff --git a/annotations/src/main/java/mindustry/annotations/BaseProcessor.java b/annotations/src/main/java/mindustry/annotations/BaseProcessor.java
index 4b188a760e..f66a5aa302 100644
--- a/annotations/src/main/java/mindustry/annotations/BaseProcessor.java
+++ b/annotations/src/main/java/mindustry/annotations/BaseProcessor.java
@@ -161,10 +161,10 @@ public abstract class BaseProcessor extends AbstractProcessor{
         filer = env.getFiler();
         messager = env.getMessager();
 
-        //System.setProperty("debug", "true");
+        Log.setLogLevel(LogLevel.info);
 
-        if(System.getProperty("debug") == null){
-            Log.setLogLevel(LogLevel.err);
+        if(System.getProperty("debug") != null){
+            Log.setLogLevel(LogLevel.debug);
         }
     }
 
diff --git a/annotations/src/main/java/mindustry/annotations/impl/EntityProcess.java b/annotations/src/main/java/mindustry/annotations/impl/EntityProcess.java
index 1df120f5bf..1d80e46c61 100644
--- a/annotations/src/main/java/mindustry/annotations/impl/EntityProcess.java
+++ b/annotations/src/main/java/mindustry/annotations/impl/EntityProcess.java
@@ -142,18 +142,18 @@ public class EntityProcess extends BaseProcessor{
 
                 //LOGGING
 
-                Log.info("&gGenerating interface for " + component.name());
+                Log.debug("&gGenerating interface for " + component.name());
 
                 for(TypeName tn : inter.superinterfaces){
-                    Log.info("&g> &lbextends {0}", simpleName(tn.toString()));
+                    Log.debug("&g> &lbextends {0}", simpleName(tn.toString()));
                 }
 
                 //log methods generated
                 for(MethodSpec spec : inter.methodSpecs){
-                    Log.info("&g> > &c{0} {1}({2})", simpleName(spec.returnType.toString()), spec.name, Array.with(spec.parameters).toString(", ", p -> simpleName(p.type.toString()) + " " + p.name));
+                    Log.debug("&g> > &c{0} {1}({2})", simpleName(spec.returnType.toString()), spec.name, Array.with(spec.parameters).toString(", ", p -> simpleName(p.type.toString()) + " " + p.name));
                 }
 
-                Log.info("");
+                Log.debug("");
             }
 
             //generate special render layer interfaces
diff --git a/annotations/src/main/java/mindustry/annotations/util/Selement.java b/annotations/src/main/java/mindustry/annotations/util/Selement.java
index d1f3e38e19..def6b001e9 100644
--- a/annotations/src/main/java/mindustry/annotations/util/Selement.java
+++ b/annotations/src/main/java/mindustry/annotations/util/Selement.java
@@ -18,6 +18,10 @@ public class Selement<T extends Element>{
         this.e = e;
     }
 
+    public Array<Selement<?>> enclosed(){
+        return Array.with(e.getEnclosedElements()).map(Selement::new);
+    }
+
     public String fullName(){
         return e.toString();
     }
diff --git a/core/src/mindustry/ctype/ContentType.java b/core/src/mindustry/ctype/ContentType.java
index de80c859bd..2c8faaa1ff 100644
--- a/core/src/mindustry/ctype/ContentType.java
+++ b/core/src/mindustry/ctype/ContentType.java
@@ -4,7 +4,7 @@ package mindustry.ctype;
 public enum ContentType{
     item,
     block,
-    mech,
+    mech_UNUSED,
     bullet,
     liquid,
     status,
diff --git a/core/src/mindustry/entities/AllEntities.java b/core/src/mindustry/entities/AllEntities.java
index 26e645d589..b279e020c2 100644
--- a/core/src/mindustry/entities/AllEntities.java
+++ b/core/src/mindustry/entities/AllEntities.java
@@ -17,7 +17,7 @@ class AllEntities{
     @EntityDef(value = {GroundEffectc.class, Childc.class}, pooled = true)
     class GroundEffectDef{}
 
-    @EntityDef({Decalc.class})
+    @EntityDef(value = {Decalc.class}, pooled = true)
     class DecalDef{}
 
     @EntityDef({Playerc.class})
diff --git a/core/src/mindustry/entities/Effect.java b/core/src/mindustry/entities/Effect.java
index d52a8caeb7..b1dd73ed69 100644
--- a/core/src/mindustry/entities/Effect.java
+++ b/core/src/mindustry/entities/Effect.java
@@ -42,35 +42,35 @@ public class Effect{
     }
 
     public void at(Position pos){
-        Effects.createEffect(this, pos.getX(), pos.getY(), 0, Color.white, null);
+        Effects.create(this, pos.getX(), pos.getY(), 0, Color.white, null);
     }
 
     public void at(Position pos, float rotation){
-        Effects.createEffect(this, pos.getX(), pos.getY(), rotation, Color.white, null);
+        Effects.create(this, pos.getX(), pos.getY(), rotation, Color.white, null);
     }
 
     public void at(float x, float y){
-        Effects.createEffect(this, x, y, 0, Color.white, null);
+        Effects.create(this, x, y, 0, Color.white, null);
     }
 
     public void at(float x, float y, float rotation){
-        Effects.createEffect(this, x, y, rotation, Color.white, null);
+        Effects.create(this, x, y, rotation, Color.white, null);
     }
 
     public void at(float x, float y, float rotation, Color color){
-        Effects.createEffect(this, x, y, rotation, color, null);
+        Effects.create(this, x, y, rotation, color, null);
     }
 
     public void at(float x, float y, Color color){
-        Effects.createEffect(this, x, y, 0, color, null);
+        Effects.create(this, x, y, 0, color, null);
     }
 
     public void at(float x, float y, float rotation, Color color, Object data){
-        Effects.createEffect(this, x, y, rotation, color, data);
+        Effects.create(this, x, y, rotation, color, data);
     }
 
     public void at(float x, float y, float rotation, Object data){
-        Effects.createEffect(this, x, y, rotation, Color.white, data);
+        Effects.create(this, x, y, rotation, Color.white, data);
     }
 
     public void render(int id, Color color, float life, float rotation, float x, float y, Object data){
diff --git a/core/src/mindustry/entities/Effects.java b/core/src/mindustry/entities/Effects.java
index 3d7f94a456..21361c5fcb 100644
--- a/core/src/mindustry/entities/Effects.java
+++ b/core/src/mindustry/entities/Effects.java
@@ -2,11 +2,13 @@ package mindustry.entities;
 
 import arc.*;
 import arc.graphics.*;
+import arc.graphics.g2d.*;
 import arc.math.*;
 import arc.math.geom.*;
 import arc.util.*;
 import mindustry.content.*;
 import mindustry.gen.*;
+import mindustry.graphics.*;
 
 import static mindustry.Vars.*;
 
@@ -32,7 +34,7 @@ public class Effects{
         shake(intensity, duration, loc.getX(), loc.getY());
     }
 
-    public static void createEffect(Effect effect, float x, float y, float rotation, Color color, Object data){
+    public static void create(Effect effect, float x, float y, float rotation, Color color, Object data){
         if(headless || effect == Fx.none) return;
         if(Core.settings.getBool("effects")){
             Rect view = Core.camera.bounds(Tmp.r1);
@@ -51,4 +53,25 @@ public class Effects{
             }
         }
     }
+
+    public static void decal(TextureRegion region, float x, float y, float rotation, float lifetime, Color color){
+        if(headless || region == null) return;
+
+        Decalc decal = DecalEntity.create();
+        decal.set(x, y);
+        decal.rotation(rotation);
+        decal.lifetime(lifetime);
+        decal.color().set(color);
+        decal.region(region);
+        decal.add();
+    }
+
+    public static void rubble(float x, float y, int blockSize){
+        if(headless) return;
+
+        TextureRegion region = Core.atlas.find("rubble-" + blockSize + "-" + Mathf.random(0, 1));
+        if(!Core.atlas.isFound(region)) return;
+
+        decal(region, x, y, Mathf.random(0, 4) * 90, 3600, Pal.rubble);
+    }
 }
diff --git a/core/src/mindustry/entities/def/DecalComp.java b/core/src/mindustry/entities/def/DecalComp.java
index c9a208366c..d6f8ea012b 100644
--- a/core/src/mindustry/entities/def/DecalComp.java
+++ b/core/src/mindustry/entities/def/DecalComp.java
@@ -2,18 +2,22 @@ package mindustry.entities.def;
 
 import arc.graphics.*;
 import arc.graphics.g2d.*;
+import arc.math.*;
 import mindustry.annotations.Annotations.*;
 import mindustry.gen.*;
 
 @Component
 abstract class DecalComp implements Drawc, Timedc, Rotc, Posc, DrawLayerFloorc{
+    transient float x, y, rotation;
+
     Color color = new Color(1, 1, 1, 1);
     TextureRegion region;
 
     @Override
     public void drawFloor(){
         Draw.color(color);
-        Draw.rect(region, x(), y(), rotation());
+        Draw.alpha(1f - Mathf.curve(fin(), 0.98f));
+        Draw.rect(region, x, y, rotation);
         Draw.color();
     }
 
diff --git a/core/src/mindustry/world/Block.java b/core/src/mindustry/world/Block.java
index 3cebc54660..e8f679cfa4 100644
--- a/core/src/mindustry/world/Block.java
+++ b/core/src/mindustry/world/Block.java
@@ -640,8 +640,7 @@ public class Block extends BlockStorage{
 
         Damage.dynamicExplosion(x, y, flammability, explosiveness * 3.5f, power, tilesize * size / 2f, Pal.darkFlame);
         if(!tile.floor().solid && !tile.floor().isLiquid){
-            //TODO rubble decal
-            //RubbleDecal.create(tile.drawx(), tile.drawy(), size);
+            Effects.rubble(tile.drawx(), tile.drawy(), size);
         }
     }
 
diff --git a/core/src/mindustry/world/blocks/BuildBlock.java b/core/src/mindustry/world/blocks/BuildBlock.java
index 7cb2a4917f..7f40261a5a 100644
--- a/core/src/mindustry/world/blocks/BuildBlock.java
+++ b/core/src/mindustry/world/blocks/BuildBlock.java
@@ -9,6 +9,7 @@ import arc.util.ArcAnnotate.*;
 import arc.util.*;
 import mindustry.annotations.Annotations.*;
 import mindustry.content.*;
+import mindustry.entities.*;
 import mindustry.game.EventType.*;
 import mindustry.game.*;
 import mindustry.gen.*;
@@ -156,8 +157,7 @@ public class BuildBlock extends Block{
         Fx.blockExplosionSmoke.at(tile);
 
         if(!tile.floor().solid && !tile.floor().isLiquid){
-            //TODO implement
-           // RubbleDecal.create(tile.drawx(), tile.drawy(), size);
+            Effects.rubble(tile.drawx(), tile.drawy(), size);
         }
     }