iOS fixes

core/src/io/anuke/mindustry/entities/effect/Decal.java

@@ -31,5 +31,10 @@ public abstract class Decal extends TimedEntity implements BelowLiquidTrait, Dra
         return groundEffectGroup;
     }
 
+    @Override
+    public float fin() {
+        return time / lifetime();
+    }
+
     abstract void drawDecal();
 }