Fix damage flash implementation

Source/MyProject3/SpaceshipPawn.h

@@ -176,6 +176,14 @@ protected:
     UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Effects")
     FLinearColor DamageFlashColor = FLinearColor(1.0f, 0.0f, 0.0f, 0.5f);
 
+    // Store the original material
+    UPROPERTY()
+    UMaterialInterface* OriginalMaterial;
+
+    // Store the dynamic material instance
+    UPROPERTY()
+    UMaterialInstanceDynamic* DynamicMaterialInstance;
+
 private:
     // Movement state
     float CurrentThrottleInput;
@@ -213,6 +221,9 @@ private:
     FTimerHandle DamageFlashTimerHandle;
     float LastDamageTime;
 
+    // Initialize dynamic material
+    void InitializeDynamicMaterial();
+
     void StartShieldRecharge();
     void RechargeShield();
     bool IsDead() const { return CurrentHealth <= 0.0f; }