fix#2

core/src/mindustry/content/Blocks.java

@@ -1527,23 +1527,31 @@ public static void load(){
             requirements(Category.defense, with(Items.copper, 6));
             health = 80 * wallHealthMultiplier;
             researchCostMultiplier = 0.1f;
+            breakable = true;
+            destructible = false;
         }};
 
         copperWallLarge = new Wall("copper-wall-large"){{
             requirements(Category.defense, ItemStack.mult(copperWall.requirements, 4));
             health = 80 * 4 * wallHealthMultiplier;
             size = 2;
+            breakable = false;
+            destructible = true;
         }};
 
         titaniumWall = new Wall("titanium-wall"){{
             requirements(Category.defense, with(Items.titanium, 6));
             health = 110 * wallHealthMultiplier;
+            breakable = false;
+            destructible = false;
         }};
 
         titaniumWallLarge = new Wall("titanium-wall-large"){{
             requirements(Category.defense, ItemStack.mult(titaniumWall.requirements, 4));
             health = 110 * wallHealthMultiplier * 4;
             size = 2;
+            breakable = true;
+            destructible = true;
         }};
 
         plastaniumWall = new Wall("plastanium-wall"){{

core/src/mindustry/world/Block.java

@@ -123,7 +123,7 @@ public class Block extends UnlockableContent implements Senseable{
     /** for static blocks only: if true, tile data() is saved in world data. */
     public boolean saveData;
     /** whether you can break this with rightclick */
-    public boolean breakable;
+    public boolean breakable = true;
     /** if true, this block will be broken by certain units stepping/moving over it */
     public boolean unitMoveBreakable;
     /** whether to add this block to brokenblocks */

core/src/mindustry/world/Tile.java

@@ -421,15 +421,15 @@ public boolean passable(){
 
     /** Whether this block was placed by a player/unit. */
     public boolean synthetic(){
-        return block.update || block.breakable || block.destructible;
+        return block.update || block.destructible || block.breakable;
     }
 
     public boolean solid(){
         return block.solid || floor.solid || (build != null && build.checkSolid());
     }
 
     public boolean breakable(){
-        return  block.breakable || block.update;
+        return block.breakable;
     }
 
     /** @return whether the floor on this tile deals damage or can be drowned on. */