Internal changes for surface-less floors

core/src/mindustry/world/blocks/ConstructBlock.java

@@ -180,7 +180,7 @@ public class ConstructBlock extends Block{
         public void onDestroyed(){
             Fx.blockExplosionSmoke.at(tile);
 
-            if(!tile.floor().solid && !tile.floor().isLiquid){
+            if(!tile.floor().solid && tile.floor().hasSurface()){
                 Effect.rubble(x, y, size);
             }
         }

core/src/mindustry/world/blocks/environment/Floor.java

@@ -166,6 +166,11 @@ public class Floor extends Block{
         return new TextureRegion[]{Core.atlas.find(Core.atlas.has(name) ? name : name + "1")};
     }
 
+    /** @return whether this floor has a valid surface on which to place things, e.g. scorch marks. */
+    public boolean hasSurface(){
+        return !isLiquid && !solid;
+    }
+
     public boolean isDeep(){
         return drownTime > 0;
     }