feat: Phase 19 - visual polish and cinematic lighting

Backend:
- Add weather transition processing logic

Unity Client:
- Add smooth UI bar transitions with lerp animations
- Implement cinematic lighting system (dawn/day/dusk/night cycle)
- Add VisualEffectsManager for advanced effects
- Support premium sprite loading for agents
- Add character and environment sprite sheets

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/app/engine.py

@@ -215,6 +215,35 @@ class GameEngine:
     # =========================================================================
     # Day/Night cycle (Phase 2)
     # =========================================================================
+    async def _process_weather(self) -> None:
+        """Process weather transitions."""
+        with get_db_session() as db:
+            world = db.query(WorldState).first()
+            if not world:
+                return
+
+            world.weather_duration += 1
+            
+            # Should we transition?
+            if world.weather_duration >= random.randint(WEATHER_MIN_DURATION, WEATHER_MAX_DURATION):
+                old_weather = world.weather
+                transitions = WEATHER_TRANSITIONS.get(old_weather, {"Sunny": 1.0})
+                
+                # Biased random choice
+                choices = list(transitions.keys())
+                weights = list(transitions.values())
+                new_weather = random.choices(choices, weights=weights, k=1)[0]
+                
+                if new_weather != old_weather:
+                    world.weather = new_weather
+                    world.weather_duration = 0
+                    
+                    await self._broadcast_event(EventType.WEATHER_CHANGE, {
+                        "old_weather": old_weather,
+                        "new_weather": new_weather,
+                        "message": f"The weather is changing to {new_weather}."
+                    })
+
     async def _advance_time(self) -> Optional[dict]:
         """Advance time and return phase change info if applicable."""
         with get_db_session() as db:

unity-client/Assets/Scripts/AgentUI.cs

@@ -151,13 +151,47 @@ namespace TheIsland.UI
             rect.sizeDelta = size;
             rect.anchoredPosition = Vector2.zero;
 
-            // Semi-transparent background
+            // Semi-transparent glass background
             var bg = panel.AddComponent<Image>();
-            bg.color = new Color(0, 0, 0, 0.5f);
+            bg.color = new Color(0.1f, 0.12f, 0.18f, 0.6f);
+
+            // Add border highlight
+            var border = new GameObject("Border");
+            border.transform.SetParent(panel.transform);
+            var bRect = border.AddComponent<RectTransform>();
+            bRect.anchorMin = Vector2.zero;
+            bRect.anchorMax = Vector2.one;
+            bRect.offsetMin = new Vector2(-1, -1);
+            bRect.offsetMax = new Vector2(1, 1);
+            var bImg = border.AddComponent<Image>();
+            bImg.color = new Color(1f, 1f, 1f, 0.1f);
+            border.transform.SetAsFirstSibling();
 
             return panel;
         }
 
+        private float _currentHp;
+        private float _currentEnergy;
+
+        private void Update()
+        {
+            if (_hpBarFill != null && _currentData != null)
+            {
+                _currentHp = Mathf.Lerp(_currentHp, _currentData.hp, Time.deltaTime * 5f);
+                float hpPercent = _currentHp / 100f;
+                _hpBarFill.rectTransform.anchorMax = new Vector2(hpPercent, 1);
+                _hpBarFill.color = Color.Lerp(hpLowColor, hpHighColor, hpPercent);
+            }
+
+            if (_energyBarFill != null && _currentData != null)
+            {
+                _currentEnergy = Mathf.Lerp(_currentEnergy, _currentData.energy, Time.deltaTime * 5f);
+                float energyPercent = _currentEnergy / 100f;
+                _energyBarFill.rectTransform.anchorMax = new Vector2(energyPercent, 1);
+                _energyBarFill.color = Color.Lerp(energyLowColor, energyHighColor, energyPercent);
+            }
+        }
+
         private TextMeshProUGUI CreateText(GameObject parent, string name, string text,
             float fontSize, Color color, FontStyles style = FontStyles.Normal)
         {
@@ -296,25 +330,11 @@ namespace TheIsland.UI
         {
             _currentData = data;
 
-            // Update HP
-            float hpPercent = data.hp / 100f;
-            if (_hpBarFill != null)
-            {
-                _hpBarFill.rectTransform.anchorMax = new Vector2(hpPercent, 1);
-                _hpBarFill.color = Color.Lerp(hpLowColor, hpHighColor, hpPercent);
-            }
             if (_hpText != null)
             {
                 _hpText.text = $"HP: {data.hp}";
             }
 
-            // Update Energy
-            float energyPercent = data.energy / 100f;
-            if (_energyBarFill != null)
-            {
-                _energyBarFill.rectTransform.anchorMax = new Vector2(energyPercent, 1);
-                _energyBarFill.color = Color.Lerp(energyLowColor, energyHighColor, energyPercent);
-            }
             if (_energyText != null)
             {
                 _energyText.text = $"Energy: {data.energy}";

unity-client/Assets/Scripts/AgentVisual.cs

@@ -82,6 +82,14 @@ namespace TheIsland.Visual
         private Vector3 _targetPosition;
         private bool _isMoving;
         private float _moveSpeed = 3f;
+
+        // UI Smoothing (Phase 19)
+        private float _currentHpPercent;
+        private float _currentEnergyPercent;
+        private float _currentMoodPercent;
+        private float _targetHpPercent;
+        private float _targetEnergyPercent;
+        private float _targetMoodPercent;
         #endregion
 
         #region Properties
@@ -157,6 +165,35 @@ namespace TheIsland.Visual
                 pos.y = 1f + _bobOffset;
                 _spriteRenderer.transform.localPosition = pos;
             }
+
+            // Phase 19: Smooth UI Bar Transitions
+            UpdateSmoothBars();
+        }
+
+        private void UpdateSmoothBars()
+        {
+            float lerpSpeed = 5f * Time.deltaTime;
+            
+            if (_hpBarFill != null)
+            {
+                _currentHpPercent = Mathf.Lerp(_currentHpPercent, _targetHpPercent, lerpSpeed);
+                _hpBarFill.rectTransform.anchorMax = new Vector2(_currentHpPercent, 1);
+                _hpBarFill.color = Color.Lerp(hpLowColor, hpHighColor, _currentHpPercent);
+            }
+
+            if (_energyBarFill != null)
+            {
+                _currentEnergyPercent = Mathf.Lerp(_currentEnergyPercent, _targetEnergyPercent, lerpSpeed);
+                _energyBarFill.rectTransform.anchorMax = new Vector2(_currentEnergyPercent, 1);
+                _energyBarFill.color = Color.Lerp(energyLowColor, energyHighColor, _currentEnergyPercent);
+            }
+
+            if (_moodBarFill != null)
+            {
+                _currentMoodPercent = Mathf.Lerp(_currentMoodPercent, _targetMoodPercent, lerpSpeed);
+                _moodBarFill.rectTransform.anchorMax = new Vector2(_currentMoodPercent, 1);
+                _moodBarFill.color = GetMoodColor(_currentData?.mood_state ?? "neutral");
+            }
         }
 
         // Trigger a jump animation (to be called by events)
@@ -218,7 +255,10 @@ namespace TheIsland.Visual
             _currentData = data;
             gameObject.name = $"Agent_{data.id}_{data.name}";
 
-            // Apply unique color based on agent ID
+            // Loading premium assets (Phase 19)
+            TryLoadPremiumSprite(data.id);
+
+            // Apply unique color based on agent ID (as fallback/tint)
             ApplyAgentColor(data.id);
 
             // Set UI text
@@ -229,6 +269,45 @@ namespace TheIsland.Visual
             Debug.Log($"[AgentVisual] Initialized: {data.name}");
         }
 
+        private void TryLoadPremiumSprite(int id)
+        {
+            // Load the collection texture from Assets
+            // Note: In a real build, we'd use Resources.Load or Addressables.
+            // For this environment, we'll try to find it in the path or use a static reference.
+            // Since we can't easily use Resources.Load at runtime for arbitrary paths, 
+            // we'll implement a simple runtime texture loader if needed, or assume it's assigned to a manager.
+            
+            // For now, let's assume the texture is assigned or loaded.
+            // I'll add a static reference to the collection texture in NetworkManager or AgentVisual.
+            
+            if (characterSprite != null) return; // Already has a sprite
+
+            StartCoroutine(LoadSpriteCoroutine(id));
+        }
+
+        private IEnumerator LoadSpriteCoroutine(int id)
+        {
+            // This is a simplified runtime loader for the demonstration
+            string path = Application.dataPath + "/Sprites/Characters.png";
+            if (!System.IO.File.Exists(path)) yield break;
+
+            byte[] fileData = System.IO.File.ReadAllBytes(path);
+            Texture2D tex = new Texture2D(2, 2);
+            tex.LoadImage(fileData);
+
+            // Slice the 1x3 collection (3 characters in a row)
+            int charIndex = id % 3;
+            float charWidth = tex.width / 3f;
+            Rect rect = new Rect(charIndex * charWidth, 0, charWidth, tex.height);
+            
+            characterSprite = Sprite.Create(tex, rect, new Vector2(0.5f, 0.5f), 100f);
+            if (_spriteRenderer != null)
+            {
+                _spriteRenderer.sprite = characterSprite;
+                _spriteRenderer.color = Color.white;
+            }
+        }
+
         private void ApplyAgentColor(int agentId)
         {
             // Generate unique color per agent
@@ -702,28 +781,23 @@ namespace TheIsland.Visual
             rect.anchoredPosition = Vector2.zero;
 
             var bg = panel.AddComponent<Image>();
-            bg.sprite = CreateRoundedRectSprite(32, 32, 8);
+            bg.sprite = CreateRoundedRectSprite(32, 32, 12);
             bg.type = Image.Type.Sliced;
-            bg.color = new Color(0.1f, 0.12f, 0.18f, 0.6f); // Lower alpha for glass effect
+            bg.color = new Color(0.05f, 0.08f, 0.15f, 0.45f); // Darker, more transparent glass
 
-            // Add subtle border
+            // Add inner glow border (Phase 19)
             var borderObj = new GameObject("Border");
             borderObj.transform.SetParent(panel.transform);
-            borderObj.transform.localPosition = Vector3.zero;
-            borderObj.transform.localRotation = Quaternion.identity;
-            borderObj.transform.localScale = Vector3.one;
-
             var borderRect = borderObj.AddComponent<RectTransform>();
             borderRect.anchorMin = Vector2.zero;
             borderRect.anchorMax = Vector2.one;
-            borderRect.offsetMin = new Vector2(-2, -2);
-            borderRect.offsetMax = new Vector2(2, 2);
-            borderRect.SetAsFirstSibling();
+            borderRect.offsetMin = new Vector2(1, 1);
+            borderRect.offsetMax = new Vector2(-1, -1);
             
             var borderImg = borderObj.AddComponent<Image>();
-            borderImg.sprite = CreateRoundedRectSprite(32, 32, 8);
+            borderImg.sprite = CreateRoundedRectSprite(32, 32, 12);
             borderImg.type = Image.Type.Sliced;
-            borderImg.color = new Color(0.3f, 0.35f, 0.45f, 0.5f);
+            borderImg.color = new Color(1f, 1f, 1f, 0.15f); // Subtle highlight
 
             return panel;
         }
@@ -918,38 +992,21 @@ namespace TheIsland.Visual
         {
             _currentData = data;
 
-            // Update HP bar
-            float hpPercent = data.hp / 100f;
-            if (_hpBarFill != null)
-            {
-                _hpBarFill.rectTransform.anchorMax = new Vector2(hpPercent, 1);
-                _hpBarFill.color = Color.Lerp(hpLowColor, hpHighColor, hpPercent);
-            }
+            // Set targets for smooth lerping (Phase 19)
+            _targetHpPercent = data.hp / 100f;
+            _targetEnergyPercent = data.energy / 100f;
+            _targetMoodPercent = data.mood / 100f;
+
             if (_hpText != null)
             {
                 _hpText.text = $"HP: {data.hp}";
             }
 
-            // Update Energy bar
-            float energyPercent = data.energy / 100f;
-            if (_energyBarFill != null)
-            {
-                _energyBarFill.rectTransform.anchorMax = new Vector2(energyPercent, 1);
-                _energyBarFill.color = Color.Lerp(energyLowColor, energyHighColor, energyPercent);
-            }
             if (_energyText != null)
             {
                 _energyText.text = $"Energy: {data.energy}";
             }
 
-            // Update Mood bar
-            float moodPercent = data.mood / 100f;
-            if (_moodBarFill != null)
-            {
-                _moodBarFill.rectTransform.anchorMax = new Vector2(moodPercent, 1);
-                _moodBarFill.color = GetMoodColor(data.mood_state);
-            }
-
             // Check for mood change (Visual Expression)
             if (_moodState != data.mood_state)
             {

unity-client/Assets/Scripts/Visual/EnvironmentManager.cs

@@ -86,6 +86,7 @@ namespace TheIsland.Visual
             }
             _instance = this;
 
+            LoadEnvironmentTexture();
             _mainCamera = Camera.main;
             CreateEnvironment();
         }
@@ -103,6 +104,12 @@ namespace TheIsland.Visual
 
             // Set initial sky
             UpdateSkyColors();
+
+            // Phase 19: Add Visual Effects Manager
+            if (FindObjectOfType<VisualEffectsManager>() == null)
+            {
+                new GameObject("VisualEffectsManager").AddComponent<VisualEffectsManager>();
+            }
         }
 
         private void Update()
@@ -116,11 +123,58 @@ namespace TheIsland.Visual
                 UpdateSkyMaterial();
             }
 
+            // Phase 19: Cinematic Lighting
+            AnimateLighting();
+
             // Animate environment (Water & Trees)
             AnimateEnvironment();
             AnimateClouds();
         }
 
+        private void AnimateLighting()
+        {
+            if (_mainLight == null) return;
+
+            // Simple 120s cycle for demonstration (30s per phase)
+            float cycleDuration = 120f;
+            float t = (Time.time % cycleDuration) / cycleDuration;
+
+            // t: 0=Dawn, 0.25=Noon, 0.5=Dusk, 0.75=Midnight
+            float intensity = 1f;
+            Color lightColor = Color.white;
+
+            if (t < 0.2f) // Dawn
+            {
+                float p = t / 0.2f;
+                intensity = Mathf.Lerp(0.5f, 1.2f, p);
+                lightColor = Color.Lerp(new Color(1f, 0.6f, 0.4f), Color.white, p);
+            }
+            else if (t < 0.5f) // Day
+            {
+                intensity = 1.2f;
+                lightColor = Color.white;
+            }
+            else if (t < 0.7f) // Dusk
+            {
+                float p = (t - 0.5f) / 0.2f;
+                intensity = Mathf.Lerp(1.2f, 0.4f, p);
+                lightColor = Color.Lerp(Color.white, new Color(1f, 0.4f, 0.2f), p);
+            }
+            else // Night
+            {
+                float p = (t - 0.7f) / 0.3f;
+                intensity = Mathf.Lerp(0.4f, 0.2f, p);
+                lightColor = new Color(0.4f, 0.5f, 1f); // Moonlight
+            }
+
+            _mainLight.intensity = intensity;
+            _mainLight.color = lightColor;
+
+            // Rotate sun
+            float sunAngle = t * 360f - 90f;
+            _mainLight.transform.rotation = Quaternion.Euler(sunAngle, -30f, 0);
+        }
+
         private void OnDestroy()
         {
             var network = NetworkManager.Instance;
@@ -338,11 +392,14 @@ namespace TheIsland.Visual
                 for (int x = 0; x < size; x++)
                 {
                     float t = (float)y / size;
-                    Color baseColor = Color.Lerp(waterShallowColor, waterDeepColor, t);
+                    // Add some noise to the base color
+                    float n = Mathf.PerlinNoise(x * 0.05f, y * 0.05f) * 0.1f;
+                    Color baseColor = Color.Lerp(waterShallowColor, waterDeepColor, t + n);
 
-                    // Add wave highlights
-                    float wave = Mathf.Sin(x * 0.2f + y * 0.1f) * 0.5f + 0.5f;
-                    baseColor = Color.Lerp(baseColor, Color.white, wave * 0.1f);
+                    // Add caustic-like highlights
+                    float wave1 = Mathf.Sin(x * 0.15f + y * 0.05f + Time.time * 0.2f) * 0.5f + 0.5f;
+                    float wave2 = Mathf.Cos(x * 0.08f - y * 0.12f + Time.time * 0.15f) * 0.5f + 0.5f;
+                    baseColor = Color.Lerp(baseColor, Color.white, (wave1 * wave2) * 0.15f);
 
                     tex.SetPixel(x, y, baseColor);
                 }
@@ -356,8 +413,11 @@ namespace TheIsland.Visual
             if (_waterMaterial == null) return;
 
             // Simple UV scrolling for wave effect
-            float offset = Time.time * waveSpeed * 0.1f;
-            _waterMaterial.mainTextureOffset = new Vector2(offset, offset * 0.5f);
+            float offset = Time.time * waveSpeed * 0.05f;
+            _waterMaterial.mainTextureOffset = new Vector2(offset, offset * 0.3f);
+            
+            // Periodically update texture for dynamic caustic effect (expensive but looks premium)
+            // Or just use the original UV scrolling if performance is an issue.
         }
 
         private void CreateLighting()
@@ -414,8 +474,27 @@ namespace TheIsland.Visual
             trunkSprite.transform.localScale = new Vector3(scale * 0.5f, scale, 1);
         }
 
+        private Texture2D _envTexture;
+
+        private void LoadEnvironmentTexture()
+        {
+            string path = Application.dataPath + "/Sprites/Environment.png";
+            if (System.IO.File.Exists(path))
+            {
+                byte[] data = System.IO.File.ReadAllBytes(path);
+                _envTexture = new Texture2D(2, 2);
+                _envTexture.LoadImage(data);
+            }
+        }
+
         private Sprite CreateTreeSprite()
         {
+            if (_envTexture != null)
+            {
+                // Slice palm tree (Assuming it's in the top-left quadrant of the collection)
+                return Sprite.Create(_envTexture, new Rect(0, _envTexture.height / 2f, _envTexture.width / 2f, _envTexture.height / 2f), new Vector2(0.5f, 0f), 100f);
+            }
+
             int width = 64;
             int height = 128;
             Texture2D tex = new Texture2D(width, height);
@@ -530,6 +609,12 @@ namespace TheIsland.Visual
 
         private Sprite CreateRockSprite()
         {
+            if (_envTexture != null)
+            {
+                // Slice rock from Environment.png (Assuming bottom-right quadrant)
+                return Sprite.Create(_envTexture, new Rect(_envTexture.width / 2f, 0, _envTexture.width / 2f, _envTexture.height / 2f), new Vector2(0.5f, 0.5f), 100f);
+            }
+
             int size = 32;
             Texture2D tex = new Texture2D(size, size);
 
@@ -575,7 +660,16 @@ namespace TheIsland.Visual
         private void HandleWeatherChange(WeatherChangeData data)
         {
             _currentWeather = data.new_weather;
-            UpdateSkyColors();
+            Debug.Log($"[EnvironmentManager] Weather changed to: {_currentWeather}");
+            
+            // Notify VFX manager
+            if (VisualEffectsManager.Instance != null)
+            {
+                VisualEffectsManager.Instance.SetWeather(_currentWeather);
+            }
+
+            // Adjust lighting based on weather
+            UpdateSkyColors(); // This will use the new weather in its logic
         }
 
         private void HandleTick(TickData data)

unity-client/Assets/Scripts/Visual/VisualEffectsManager.cs

@@ -0,0 +1,243 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace TheIsland.Visual
+{
+    /// <summary>
+    /// Manages environmental visual effects like fireflies, stars, and weather (Phase 19 & 20).
+    /// </summary>
+    public class VisualEffectsManager : MonoBehaviour
+    {
+        public static VisualEffectsManager Instance { get; private set; }
+
+        [Header("Fireflies")]
+        [SerializeField] private int fireflyCount = 20;
+        [SerializeField] private Color fireflyColor = new Color(1f, 1f, 0.5f, 0.8f);
+        [SerializeField] private Vector2 islandBounds = new Vector2(10, 10);
+
+        [Header("Stars & Meteors")]
+        [SerializeField] private int starCount = 50;
+        [SerializeField] private Color starColor = Color.white;
+        [SerializeField] private float meteorInterval = 15f;
+
+        [Header("Weather VFX")]
+        [SerializeField] private int rainDensity = 120;
+        private List<GameObject> _rainDrops = new List<GameObject>();
+        private string _activeWeather = "Sunny";
+        private Sprite _rainSprite;
+
+        private List<GameObject> _fireflies = new List<GameObject>();
+        private List<GameObject> _stars = new List<GameObject>();
+        private float _meteorTimer;
+
+        private void Awake()
+        {
+            Instance = this;
+            _rainSprite = CreateRainSprite();
+            CreateFireflies();
+            CreateStars();
+            CreateRain();
+        }
+
+        public void SetWeather(string weather)
+        {
+            _activeWeather = weather;
+            Debug.Log($"[VFXManager] Setting weather visuals for: {weather}");
+            
+            // Toggle systems
+            bool isRainy = weather == "Rainy" || weather == "Stormy";
+            foreach (var drop in _rainDrops) drop.SetActive(isRainy);
+            
+            if (weather == "Stormy") StartCoroutine(LightningLoop());
+        }
+
+        private void Update()
+        {
+            UpdateAtmosphere();
+            UpdateRain();
+        }
+
+        private void UpdateAtmosphere()
+        {
+            float t = (Time.time % 120f) / 120f;
+            bool isNight = t > 0.65f || t < 0.15f;
+            float starAlpha = isNight ? (t > 0.75f || t < 0.05f ? 1f : 0.5f) : 0f;
+
+            foreach (var star in _stars)
+            {
+                var sprite = star.GetComponent<SpriteRenderer>();
+                sprite.color = new Color(starColor.r, starColor.g, starColor.b, starAlpha * 0.8f);
+            }
+
+            if (isNight)
+            {
+                _meteorTimer += Time.deltaTime;
+                if (_meteorTimer >= meteorInterval)
+                {
+                    _meteorTimer = 0;
+                    if (Random.value < 0.3f) StartCoroutine(ShootMeteor());
+                }
+            }
+        }
+
+        private void CreateFireflies()
+        {
+            for (int i = 0; i < fireflyCount; i++)
+            {
+                var firefly = new GameObject($"Firefly_{i}");
+                firefly.transform.SetParent(transform);
+                float x = Random.Range(-islandBounds.x, islandBounds.x);
+                float z = Random.Range(-islandBounds.y, islandBounds.y);
+                firefly.transform.position = new Vector3(x, Random.Range(1f, 3f), z);
+
+                var sprite = firefly.AddComponent<SpriteRenderer>();
+                sprite.sprite = CreateGlowSprite();
+                sprite.color = fireflyColor;
+                sprite.sortingOrder = 50;
+                firefly.AddComponent<Billboard>();
+                _fireflies.Add(firefly);
+                StartCoroutine(AnimateFirefly(firefly));
+            }
+        }
+
+        private void CreateStars()
+        {
+            for (int i = 0; i < starCount; i++)
+            {
+                var star = new GameObject($"Star_{i}");
+                star.transform.SetParent(transform);
+                float x = Random.Range(-25f, 25f);
+                float y = Random.Range(10f, 15f);
+                float z = Random.Range(-25f, 25f);
+                star.transform.position = new Vector3(x, y, z);
+
+                var sprite = star.AddComponent<SpriteRenderer>();
+                sprite.sprite = CreateGlowSprite();
+                sprite.color = new Color(1, 1, 1, 0);
+                sprite.sortingOrder = -50;
+                star.AddComponent<Billboard>().ConfigureForUI();
+                _stars.Add(star);
+            }
+        }
+
+        private void CreateRain()
+        {
+            for (int i = 0; i < rainDensity; i++)
+            {
+                var drop = new GameObject($"Rain_{i}");
+                drop.transform.SetParent(transform);
+                var sprite = drop.AddComponent<SpriteRenderer>();
+                sprite.sprite = _rainSprite;
+                sprite.color = new Color(0.8f, 0.9f, 1f, 0.6f);
+                sprite.sortingOrder = 100;
+                ResetRainDrop(drop);
+                drop.SetActive(false);
+                _rainDrops.Add(drop);
+            }
+        }
+
+        private void ResetRainDrop(GameObject drop)
+        {
+            float x = Random.Range(-20f, 20f);
+            float y = Random.Range(10f, 15f);
+            float z = Random.Range(-20f, 20f);
+            drop.transform.position = new Vector3(x, y, z);
+        }
+
+        private void UpdateRain()
+        {
+            if (_activeWeather != "Rainy" && _activeWeather != "Stormy") return;
+            float speed = _activeWeather == "Stormy" ? 40f : 20f;
+            foreach (var drop in _rainDrops)
+            {
+                drop.transform.position += Vector3.down * speed * Time.deltaTime;
+                drop.transform.position += Vector3.left * speed * 0.2f * Time.deltaTime;
+                if (drop.transform.position.y < -2f) ResetRainDrop(drop);
+            }
+        }
+
+        private IEnumerator LightningLoop()
+        {
+            while (_activeWeather == "Stormy")
+            {
+                yield return new WaitForSeconds(Random.Range(3f, 10f));
+                var flash = new GameObject("LightningFlash");
+                var img = flash.AddComponent<SpriteRenderer>();
+                img.sprite = CreateGlowSprite();
+                img.color = new Color(1, 1, 1, 0.8f);
+                flash.transform.position = new Vector3(0, 10, 0);
+                flash.transform.localScale = new Vector3(100, 100, 1);
+                yield return new WaitForSeconds(0.05f);
+                img.color = new Color(1, 1, 1, 0.3f);
+                yield return new WaitForSeconds(0.05f);
+                Destroy(flash);
+            }
+        }
+
+        private IEnumerator ShootMeteor()
+        {
+            var meteor = new GameObject("Meteor");
+            meteor.transform.SetParent(transform);
+            Vector3 startPos = new Vector3(Random.Range(-20, 20), 15, Random.Range(-20, 20));
+            Vector3 direction = new Vector3(Random.Range(-10, 10), -5, Random.Range(-10, 10)).normalized;
+            meteor.transform.position = startPos;
+            var sprite = meteor.AddComponent<SpriteRenderer>();
+            sprite.sprite = CreateGlowSprite();
+            sprite.color = Color.white;
+            sprite.transform.localScale = new Vector3(0.5f, 0.1f, 1f);
+            float duration = 1.0f;
+            float elapsed = 0;
+            while (elapsed < duration)
+            {
+                elapsed += Time.deltaTime;
+                meteor.transform.position += direction * 30f * Time.deltaTime;
+                sprite.color = new Color(1, 1, 1, 1f - (elapsed / duration));
+                yield return null;
+            }
+            Destroy(meteor);
+        }
+
+        private Sprite CreateRainSprite()
+        {
+            Texture2D tex = new Texture2D(2, 8);
+            for (int y = 0; y < 8; y++)
+                for (int x = 0; x < 2; x++) tex.SetPixel(x, y, Color.white);
+            tex.Apply();
+            return Sprite.Create(tex, new Rect(0, 0, 2, 8), new Vector2(0.5f, 0.5f));
+        }
+
+        private Sprite CreateGlowSprite()
+        {
+            int size = 32;
+            Texture2D tex = new Texture2D(size, size);
+            tex.filterMode = FilterMode.Bilinear;
+            for (int y = 0; y < size; y++)
+                for (int x = 0; x < size; x++) {
+                    float dist = Vector2.Distance(new Vector2(x, y), new Vector2(size/2f, size/2f)) / (size/2f);
+                    float alpha = Mathf.Exp(-dist * 4f);
+                    tex.SetPixel(x, y, new Color(1, 1, 1, alpha));
+                }
+            tex.Apply();
+            return Sprite.Create(tex, new Rect(0, 0, size, size), new Vector2(0.5f, 0.5f));
+        }
+
+        private IEnumerator AnimateFirefly(GameObject firefly)
+        {
+            Vector3 startPos = firefly.transform.position;
+            float seed = Random.value * 100f;
+            while (true)
+            {
+                float t = Time.time + seed;
+                float dx = (Mathf.PerlinNoise(t * 0.2f, 0) - 0.5f) * 2f;
+                float dy = (Mathf.PerlinNoise(0, t * 0.2f) - 0.5f) * 1f;
+                float dz = (Mathf.PerlinNoise(t * 0.1f, t * 0.1f) - 0.5f) * 2f;
+                firefly.transform.position = startPos + new Vector3(dx, dy, dz);
+                var sprite = firefly.GetComponent<SpriteRenderer>();
+                float pulse = Mathf.PingPong(t, 1f) * 0.5f + 0.5f;
+                sprite.color = new Color(fireflyColor.r, fireflyColor.g, fireflyColor.b, pulse * fireflyColor.a);
+                yield return null;
+            }
+        }
+    }
+}

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