diff --git a/Core/FirstUpdateHook.cs b/Core/FirstUpdateHook.cs
index 42b9813..33cb51b 100644
--- a/Core/FirstUpdateHook.cs
+++ b/Core/FirstUpdateHook.cs
@@ -1,3 +1,4 @@
+using ADOFAIRenderer.UI;
 using UnityEngine;
 
 namespace ADOFAIRenderer.Core
@@ -5,8 +6,16 @@ namespace ADOFAIRenderer.Core
     [DefaultExecutionOrder(int.MinValue)]
     public class FirstUpdateHook : MonoBehaviour
     {
+        private bool _checkedFFmpeg;
+
         private void Update()
         {
+            if (!_checkedFFmpeg)
+            {
+                _checkedFFmpeg = true;
+                FFmpegDownloadUI.ShowDownloadUI();
+            }
+
             if (RenderManager.Instance)
             {
                 RenderManager.Instance.OnPreRenderUpdate();
diff --git a/UI/FFmpegDownloadUI.cs b/UI/FFmpegDownloadUI.cs
new file mode 100644
index 0000000..b0f06c0
--- /dev/null
+++ b/UI/FFmpegDownloadUI.cs
@@ -0,0 +1,577 @@
+using System;
+using System.IO;
+using System.IO.Compression;
+using System.Net.Http;
+using System.Threading.Tasks;
+using TMPro;
+using UnityEngine;
+using UnityEngine.UI;
+using MelonLoader;
+using MelonLoader.Utils;
+
+namespace ADOFAIRenderer.UI
+{
+    public class FFmpegDownloadUI : MonoBehaviour
+    {
+        private GameObject _buttonContainerObj = null!;
+        private GameObject _progressBarObj = null!;
+        private GameObject _progressBarFillObj = null!;
+        private RectTransform _fillRect = null!;
+        private TextMeshProUGUI _progressText = null!;
+        private GameObject _statusTextObj = null!;
+        private TextMeshProUGUI _statusText = null!;
+
+        private bool _isDownloading;
+        private readonly string _downloadUrl = "https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-win64-gpl-shared.zip";
+        
+        private System.Threading.CancellationTokenSource? _cts;
+        private readonly System.Collections.Concurrent.ConcurrentQueue<Action> _mainThreadQueue = new();
+
+        private static bool CheckFFmpegExists()
+        {
+            var userLibs = MelonEnvironment.UserLibsDirectory;
+            if (!Directory.Exists(userLibs)) return false;
+            
+            // Check for avcodec-*.dll
+            var files = Directory.GetFiles(userLibs, "avcodec-*.dll");
+            return files.Length > 0;
+        }
+
+        public static void ShowDownloadUI()
+        {
+            
+            if (CheckFFmpegExists()) return;
+            
+            var obj = new GameObject("FFmpegDownloadUI");
+            DontDestroyOnLoad(obj);
+            obj.AddComponent<FFmpegDownloadUI>();
+        }
+
+        private void Awake()
+        {
+            if (CheckFFmpegExists())
+            {
+                Destroy(gameObject);
+            }
+        }
+
+        private static TMP_FontAsset GetNanumSquareNeoBdFontAsset()
+        {
+            TMP_FontAsset? font = null;
+            if (RenderMod.FontBundle != null)
+            {
+                try
+                {
+                    font = RenderMod.FontBundle.LoadAsset<TMP_FontAsset>("NanumSquareNeoOTF-Bd SDF");
+                }
+                catch
+                {
+                    // 로딩 실패
+                }
+            }
+
+            // 폴백 처리
+            if (font == null)
+            {
+                try
+                {
+                    font = RDString.fontData.fontTMP;
+                }
+                catch
+                {
+                    // ignored
+                }
+            }
+            if (font == null)
+            {
+                // ReSharper disable once Unity.UnknownResource
+                font = Resources.Load<TMP_FontAsset>("Fonts & Materials/LiberationSans SDF");
+            }
+
+            if (font != null) return font;
+            var fonts = Resources.FindObjectsOfTypeAll<TMP_FontAsset>();
+            if (fonts.Length > 0) font = fonts[0];
+
+            return font!;
+        }
+
+        private void Start()
+        {
+            // UI 레이어(5) 설정
+            gameObject.layer = 5;
+            
+            // Canvas 설정
+            var canvas = gameObject.AddComponent<Canvas>();
+            canvas.renderMode = RenderMode.ScreenSpaceOverlay;
+            canvas.sortingOrder = 32767; // 최상위
+            
+            // 해상도 대응 캔버스 스케일러 설정
+            var scaler = gameObject.AddComponent<CanvasScaler>();
+            scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
+            scaler.referenceResolution = new Vector2(1920, 1080);
+            scaler.screenMatchMode = CanvasScaler.ScreenMatchMode.MatchWidthOrHeight;
+            scaler.matchWidthOrHeight = 0.5f;
+            
+            gameObject.AddComponent<GraphicRaycaster>();
+            
+            // 1. 전체 화면 오버레이 배경 생성
+            var bgPanelObj = new GameObject("BackgroundPanel");
+            bgPanelObj.transform.SetParent(transform, false);
+            bgPanelObj.layer = 5;
+            
+            var bgImage = bgPanelObj.AddComponent<Image>();
+            bgImage.color = new Color(0f, 0f, 0f, 0.65f); // 어두운 투명 오버레이
+            bgImage.raycastTarget = true;
+            
+            var bgRect = bgPanelObj.GetComponent<RectTransform>();
+            bgRect.anchorMin = Vector2.zero;
+            bgRect.anchorMax = Vector2.one;
+            bgRect.offsetMin = Vector2.zero;
+            bgRect.offsetMax = Vector2.zero;
+            
+            var font = GetNanumSquareNeoBdFontAsset();
+            
+            // 2. 모달 컨테이너 생성 (다른 UI들과 디자인 일관성을 위해 동일한 아크릴 다크톤과 흰색 굵은 외곽선 적용)
+            var modalContainerObj = new GameObject("ModalContainer");
+            modalContainerObj.transform.SetParent(bgPanelObj.transform, false);
+            modalContainerObj.layer = 5;
+            
+            var modalImage = modalContainerObj.AddComponent<Image>();
+            modalImage.color = new Color(0.08f, 0.08f, 0.1f, 0.88f); // 다른 UI의 배경 톤과 동일
+            
+            var modalOutline = modalContainerObj.AddComponent<Outline>();
+            modalOutline.effectColor = Color.white; // DebugMonitorUI와 일치하는 흰색 외곽선
+            modalOutline.effectDistance = new Vector2(3.0f, -3.0f);
+            
+            var modalRect = modalContainerObj.GetComponent<RectTransform>();
+            modalRect.anchorMin = new Vector2(0.5f, 0.5f);
+            modalRect.anchorMax = new Vector2(0.5f, 0.5f);
+            modalRect.pivot = new Vector2(0.5f, 0.5f);
+            modalRect.sizeDelta = new Vector2(600, 320);
+            
+            // 4. 타이틀 텍스트 생성
+            var titleObj = new GameObject("TitleText");
+            titleObj.transform.SetParent(modalContainerObj.transform, false);
+            titleObj.layer = 5;
+            
+            var titleText = titleObj.AddComponent<TextMeshProUGUI>();
+            titleText.text = "FFmpeg 라이브러리 설치 필요";
+            titleText.fontSize = 26;
+            titleText.font = font;
+            titleText.color = Color.white;
+            titleText.alignment = TextAlignmentOptions.Center;
+            
+            var titleRect = titleObj.GetComponent<RectTransform>();
+            titleRect.anchorMin = new Vector2(0, 1);
+            titleRect.anchorMax = new Vector2(1, 1);
+            titleRect.pivot = new Vector2(0.5f, 1);
+            titleRect.anchoredPosition = new Vector2(0, -35);
+            titleRect.sizeDelta = new Vector2(0, 40);
+            
+            // 5. 본문 설명 텍스트 생성
+            var descObj = new GameObject("DescriptionText");
+            descObj.transform.SetParent(modalContainerObj.transform, false);
+            descObj.layer = 5;
+            
+            var descText = descObj.AddComponent<TextMeshProUGUI>();
+            descText.text = "동영상을 렌더링하려면 FFmpeg 공유 라이브러리가 필요합니다.\n아래 버튼을 눌러 인터넷에서 자동으로 다운로드하여 설치합니다.\n<color=#aaaaaa><size=13>(다운로드 크기: 약 70MB, UserLibs 폴더에 압축 해제됨)</size></color>";
+            descText.fontSize = 16;
+            descText.font = font;
+            descText.color = new Color(0.85f, 0.85f, 0.85f, 1f);
+            descText.alignment = TextAlignmentOptions.Center;
+            descText.lineSpacing = 10;
+            
+            var descRect = descObj.GetComponent<RectTransform>();
+            descRect.anchorMin = new Vector2(0, 0.5f);
+            descRect.anchorMax = new Vector2(1, 1);
+            descRect.pivot = new Vector2(0.5f, 0.5f);
+            descRect.anchoredPosition = new Vector2(0, -60);
+            descRect.sizeDelta = new Vector2(-40, 100);
+            
+            // 6. 버튼 컨테이너 생성
+            _buttonContainerObj = new GameObject("ButtonContainer", typeof(RectTransform));
+            _buttonContainerObj.transform.SetParent(modalContainerObj.transform, false);
+            _buttonContainerObj.layer = 5;
+            
+            var btnContainerRect = _buttonContainerObj.GetComponent<RectTransform>();
+            btnContainerRect.anchorMin = new Vector2(0, 0);
+            btnContainerRect.anchorMax = new Vector2(1, 0);
+            btnContainerRect.pivot = new Vector2(0.5f, 0);
+            btnContainerRect.anchoredPosition = new Vector2(0, 35);
+            btnContainerRect.sizeDelta = new Vector2(0, 50);
+            
+            // 7. 다운로드 버튼 생성
+            var downloadBtnObj = new GameObject("DownloadButton");
+            downloadBtnObj.transform.SetParent(_buttonContainerObj.transform, false);
+            downloadBtnObj.layer = 5;
+            
+            var downloadImg = downloadBtnObj.AddComponent<Image>();
+            downloadImg.color = new Color(0.0f, 0.8f, 1.0f, 1.0f); // Sleek cyan/blue
+            downloadImg.raycastTarget = true;
+            
+            var downloadBtn = downloadBtnObj.AddComponent<Button>();
+            SetupButtonStyle(downloadBtn, new Color(0.0f, 0.8f, 1.0f, 1.0f), new Color(0.2f, 0.9f, 1.0f, 1.0f), new Color(0.0f, 0.6f, 0.8f, 1.0f));
+            downloadBtn.onClick.AddListener(StartDownloadProcess);
+            
+            var downloadBtnRect = downloadBtnObj.GetComponent<RectTransform>();
+            downloadBtnRect.anchorMin = new Vector2(0.5f, 0.5f);
+            downloadBtnRect.anchorMax = new Vector2(0.5f, 0.5f);
+            downloadBtnRect.pivot = new Vector2(1f, 0.5f);
+            downloadBtnRect.anchoredPosition = new Vector2(-15, 0);
+            downloadBtnRect.sizeDelta = new Vector2(180, 45);
+            
+            var downloadTextObj = new GameObject("DownloadText");
+            downloadTextObj.transform.SetParent(downloadBtnObj.transform, false);
+            downloadTextObj.layer = 5;
+            
+            var downloadText = downloadTextObj.AddComponent<TextMeshProUGUI>();
+            downloadText.text = "다운로드 및 설치";
+            downloadText.fontSize = 15;
+            downloadText.font = font;
+            downloadText.color = Color.white;
+            downloadText.alignment = TextAlignmentOptions.Center;
+            
+            var downloadTextRect = downloadTextObj.GetComponent<RectTransform>();
+            downloadTextRect.anchorMin = Vector2.zero;
+            downloadTextRect.anchorMax = Vector2.one;
+            downloadTextRect.offsetMin = Vector2.zero;
+            downloadTextRect.offsetMax = Vector2.zero;
+            
+            // 8. 취소 버튼 생성
+            var cancelBtnObj = new GameObject("CancelButton");
+            cancelBtnObj.transform.SetParent(_buttonContainerObj.transform, false);
+            cancelBtnObj.layer = 5;
+            
+            var cancelImg = cancelBtnObj.AddComponent<Image>();
+            cancelImg.color = new Color(0.2f, 0.2f, 0.23f, 1f);
+            cancelImg.raycastTarget = true;
+            
+            var cancelBtn = cancelBtnObj.AddComponent<Button>();
+            SetupButtonStyle(cancelBtn, new Color(0.2f, 0.2f, 0.23f, 1f), new Color(0.25f, 0.25f, 0.28f, 1f), new Color(0.15f, 0.15f, 0.18f, 1f));
+            cancelBtn.onClick.AddListener(CancelProcess);
+            
+            var cancelBtnRect = cancelBtnObj.GetComponent<RectTransform>();
+            cancelBtnRect.anchorMin = new Vector2(0.5f, 0.5f);
+            cancelBtnRect.anchorMax = new Vector2(0.5f, 0.5f);
+            cancelBtnRect.pivot = new Vector2(0f, 0.5f);
+            cancelBtnRect.anchoredPosition = new Vector2(15, 0);
+            cancelBtnRect.sizeDelta = new Vector2(180, 45);
+            
+            var cancelTextObj = new GameObject("CancelText");
+            cancelTextObj.transform.SetParent(cancelBtnObj.transform, false);
+            cancelTextObj.layer = 5;
+            
+            var cancelText = cancelTextObj.AddComponent<TextMeshProUGUI>();
+            cancelText.text = "취소";
+            cancelText.fontSize = 15;
+            cancelText.font = font;
+            cancelText.color = new Color(0.9f, 0.9f, 0.9f, 1f);
+            cancelText.alignment = TextAlignmentOptions.Center;
+            
+            var cancelTextRect = cancelTextObj.GetComponent<RectTransform>();
+            cancelTextRect.anchorMin = Vector2.zero;
+            cancelTextRect.anchorMax = Vector2.one;
+            cancelTextRect.offsetMin = Vector2.zero;
+            cancelTextRect.offsetMax = Vector2.zero;
+            
+            // 9. 프로그레스 바 컨테이너 생성
+            _progressBarObj = new GameObject("ProgressBarContainer");
+            _progressBarObj.transform.SetParent(modalContainerObj.transform, false);
+            _progressBarObj.layer = 5;
+            _progressBarObj.SetActive(false);
+            
+            var barBgImg = _progressBarObj.AddComponent<Image>();
+            barBgImg.color = new Color(0.08f, 0.08f, 0.1f, 1.0f); // DebugMonitorUI의 BarBackgroundColor와 동일
+            
+            var barBgOutline = _progressBarObj.AddComponent<Outline>();
+            barBgOutline.effectColor = Color.white; // DebugMonitorUI의 BarOutlineColor와 동일
+            barBgOutline.effectDistance = new Vector2(3.0f, -3.0f); // DebugMonitorUI의 BarOutlineDistance와 동일
+            
+            var barRect = _progressBarObj.GetComponent<RectTransform>();
+            barRect.anchorMin = new Vector2(0.5f, 0);
+            barRect.anchorMax = new Vector2(0.5f, 0);
+            barRect.pivot = new Vector2(0.5f, 0);
+            barRect.anchoredPosition = new Vector2(0, 75);
+            barRect.sizeDelta = new Vector2(480, 24);
+            
+            // 10. 프로그레스 바 채우기 이미지 생성
+            _progressBarFillObj = new GameObject("ProgressBarFill");
+            _progressBarFillObj.transform.SetParent(_progressBarObj.transform, false);
+            _progressBarFillObj.layer = 5;
+            
+            var fillImg = _progressBarFillObj.AddComponent<Image>();
+            fillImg.color = new Color(0.0f, 0.8f, 1.0f, 1.0f); // DebugMonitorUI의 BarFillColor와 동일
+            
+            _fillRect = _progressBarFillObj.GetComponent<RectTransform>();
+            _fillRect.anchorMin = new Vector2(0, 0);
+            _fillRect.anchorMax = new Vector2(0, 1); // anchorMax.x가 동적으로 변경됨
+            _fillRect.pivot = new Vector2(0, 0.5f);
+            _fillRect.anchoredPosition = Vector2.zero;
+            _fillRect.sizeDelta = Vector2.zero;
+            
+            // 11. 프로그레스 텍스트 생성 (진행률 표시)
+            var progressTextObj = new GameObject("ProgressBarText");
+            progressTextObj.transform.SetParent(_progressBarObj.transform, false);
+            progressTextObj.layer = 5;
+            
+            _progressText = progressTextObj.AddComponent<TextMeshProUGUI>();
+            _progressText.fontSize = 16; // DebugMonitorUI의 BarTextFontSize와 일치
+            _progressText.font = font;
+            _progressText.color = Color.white;
+            _progressText.alignment = TextAlignmentOptions.Center;
+            
+            var progressTextOutline = progressTextObj.AddComponent<Outline>();
+            progressTextOutline.effectColor = new Color(0, 0, 0, 0.8f);
+            progressTextOutline.effectDistance = new Vector2(1, -1);
+            
+            var progressTextRect = progressTextObj.GetComponent<RectTransform>();
+            progressTextRect.anchorMin = Vector2.zero;
+            progressTextRect.anchorMax = Vector2.one;
+            progressTextRect.offsetMin = Vector2.zero;
+            progressTextRect.offsetMax = Vector2.zero;
+            
+            // 12. 상태 텍스트 생성
+            _statusTextObj = new GameObject("StatusText");
+            _statusTextObj.transform.SetParent(modalContainerObj.transform, false);
+            _statusTextObj.layer = 5;
+            _statusTextObj.SetActive(false);
+            
+            _statusText = _statusTextObj.AddComponent<TextMeshProUGUI>();
+            _statusText.fontSize = 16; // DebugMonitorUI의 텍스트 크기와 일치
+            _statusText.font = font;
+            _statusText.color = new Color(0.8f, 0.8f, 0.8f, 1f);
+            _statusText.alignment = TextAlignmentOptions.Center;
+            
+            var statusRect = _statusTextObj.GetComponent<RectTransform>();
+            statusRect.anchorMin = new Vector2(0, 0);
+            statusRect.anchorMax = new Vector2(1, 0);
+            statusRect.pivot = new Vector2(0.5f, 0);
+            statusRect.anchoredPosition = new Vector2(0, 35);
+            statusRect.sizeDelta = new Vector2(0, 30);
+        }
+
+        private void SetupButtonStyle(Button button, Color normalColor, Color hoverColor, Color pressedColor)
+        {
+            button.transition = Selectable.Transition.ColorTint;
+            var colors = button.colors;
+            colors.normalColor = normalColor;
+            colors.highlightedColor = hoverColor;
+            colors.pressedColor = pressedColor;
+            colors.disabledColor = new Color(0.3f, 0.3f, 0.3f, 1f);
+            button.colors = colors;
+        }
+
+        private void Update()
+        {
+            // 백그라운드 스레드에서 메인 스레드로 넘겨진 작업 순차 실행
+            while (_mainThreadQueue.TryDequeue(out var action))
+            {
+                action?.Invoke();
+            }
+        }
+
+        private void ExecuteOnMainThread(Action action)
+        {
+            _mainThreadQueue.Enqueue(action);
+        }
+
+        private void StartDownloadProcess()
+        {
+            if (_isDownloading) return;
+            _isDownloading = true;
+
+            // 버튼 숨기고 프로그레스 바 및 상태 텍스트 표시
+            _buttonContainerObj.SetActive(false);
+            _progressBarObj.SetActive(true);
+            _statusTextObj.SetActive(true);
+
+            _cts = new System.Threading.CancellationTokenSource();
+
+            // 백그라운드 스레드에서 다운로드 시작
+            Task.Run(async () =>
+            {
+                string tempZipPath = "";
+                try
+                {
+                    UpdateStatus("다운로드 시작하는 중...", new Color(0.8f, 0.8f, 0.8f));
+                    UpdateProgress(0f, "0%");
+
+                    var userLibsDir = MelonEnvironment.UserLibsDirectory;
+                    if (!Directory.Exists(userLibsDir))
+                    {
+                        Directory.CreateDirectory(userLibsDir);
+                    }
+
+                    tempZipPath = Path.Combine(userLibsDir, "ffmpeg_temp.zip");
+                    
+                    var progressReporter = new Progress<float>(percent =>
+                    {
+                        UpdateProgress(percent, $"{percent * 100f:F1}%");
+                        UpdateStatus($"다운로드 중... ({(percent * 100f):F1}%)", new Color(0f, 0.8f, 1f));
+                    });
+
+                    await DownloadFileAsync(_downloadUrl, tempZipPath, progressReporter, _cts.Token);
+
+                    // 다운로드 완료 후 압축 해제
+                    UpdateStatus("압축 해제 및 DLL 파일 복사 중...", new Color(0.9f, 0.9f, 0.2f));
+                    UpdateProgress(0.99f, "압축 해제 중...");
+
+                    await ExtractDllsAsync(tempZipPath, userLibsDir);
+
+                    // 완료 상태 업데이트
+                    UpdateStatus("FFmpeg 설치 완료!", new Color(0.2f, 0.9f, 0.2f));
+                    UpdateProgress(1f, "100%");
+
+                    await Task.Delay(1000);
+
+                    // 메인 스레드에서 UI를 삭제
+                    ExecuteOnMainThread(() =>
+                    {
+                        Destroy(gameObject);
+                    });
+                }
+                catch (OperationCanceledException)
+                {
+                    // 취소 시 임시 파일 정리
+                    if (!string.IsNullOrEmpty(tempZipPath) && File.Exists(tempZipPath))
+                    {
+                        try { File.Delete(tempZipPath); }
+                        catch
+                        {
+                            // ignored
+                        }
+                    }
+                    UpdateStatus("다운로드가 취소되었습니다.", new Color(0.9f, 0.5f, 0.2f));
+                }
+                catch (Exception ex)
+                {
+                    Melon<RenderMod>.Logger.Error($"FFmpeg 다운로드/설치 중 에러 발생: {ex}");
+                    UpdateStatus($"설치 실패: {ex.Message}", new Color(1f, 0.3f, 0.3f));
+                    
+                    // 실패 시 버튼 재설정
+                    ExecuteOnMainThread(() =>
+                    {
+                        _isDownloading = false;
+                        _buttonContainerObj.SetActive(true);
+                        var downloadBtnText = _buttonContainerObj.transform.Find("DownloadButton/DownloadText")?.GetComponent<TextMeshProUGUI>();
+                        if (downloadBtnText != null)
+                        {
+                            downloadBtnText.text = "재시도 (Retry)";
+                        }
+                    });
+                }
+            });
+        }
+
+        private void CancelProcess()
+        {
+            if (_isDownloading)
+            {
+                _cts?.Cancel();
+            }
+            Destroy(gameObject);
+        }
+
+        private void UpdateStatus(string message, Color color)
+        {
+            ExecuteOnMainThread(() =>
+            {
+                if (_statusText != null)
+                {
+                    _statusText.text = message;
+                    _statusText.color = color;
+                }
+            });
+        }
+
+        private void UpdateProgress(float percent, string text)
+        {
+            ExecuteOnMainThread(() =>
+            {
+                if (_fillRect != null)
+                {
+                    _fillRect.anchorMax = new Vector2(percent, 1f);
+                }
+                if (_progressText != null)
+                {
+                    _progressText.text = text;
+                }
+            });
+        }
+
+        private async Task DownloadFileAsync(string url, string destinationPath, IProgress<float> progress, System.Threading.CancellationToken cancellationToken)
+        {
+            using var client = new HttpClient();
+            // User-Agent 헤더 추가하여 차단 방지
+            client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) ADOFAIRenderer/1.0");
+            
+            using var response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
+            response.EnsureSuccessStatusCode();
+            
+            var totalBytes = response.Content.Headers.ContentLength ?? -1L;
+            await using var contentStream = await response.Content.ReadAsStreamAsync();
+            await using var fileStream = new FileStream(destinationPath, FileMode.Create, FileAccess.Write, FileShare.None, 8192, true);
+            
+            var buffer = new byte[8192];
+            var totalRead = 0L;
+            int read;
+            
+            while ((read = await contentStream.ReadAsync(buffer, 0, buffer.Length, cancellationToken)) > 0)
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+                await fileStream.WriteAsync(buffer, 0, read, cancellationToken);
+                totalRead += read;
+
+                if (totalBytes == -1) continue;
+                var progressPercent = (float)totalRead / totalBytes;
+                progress.Report(progressPercent);
+            }
+        }
+
+        private async Task ExtractDllsAsync(string zipPath, string outputDirectory)
+        {
+            try
+            {
+                await Task.Run(() =>
+                {
+                    using var archive = ZipFile.OpenRead(zipPath);
+                    foreach (var entry in archive.Entries)
+                    {
+                        // dll 파일만 userlibs 디렉토리 경로에 바로 복사
+                        if (entry.FullName.EndsWith(".dll", StringComparison.OrdinalIgnoreCase))
+                        {
+                            var targetPath = Path.Combine(outputDirectory, entry.Name);
+                            
+                            var dir = Path.GetDirectoryName(targetPath);
+                            if (dir != null && !Directory.Exists(dir))
+                            {
+                                Directory.CreateDirectory(dir);
+                            }
+                            
+                            entry.ExtractToFile(targetPath, overwrite: true);
+                        }
+                    }
+                });
+            }
+            finally
+            {
+                if (File.Exists(zipPath))
+                {
+                    try
+                    {
+                        File.Delete(zipPath);
+                    }
+                    catch (Exception ex)
+                    {
+                        Melon<RenderMod>.Logger.Warning($"임시 ZIP 파일 삭제 실패: {ex.Message}");
+                    }
+                }
+            }
+        }
+
+        private void OnDestroy()
+        {
+            _cts?.Dispose();
+        }
+    }
+}
\ No newline at end of file