diff --git a/imageringlist.cpp b/imageringlist.cpp
index 2b9aa99..64f1fc5 100644
--- a/imageringlist.cpp
+++ b/imageringlist.cpp
@@ -1,4 +1,5 @@
 #include "imageringlist.h"
+#include <functional>
 #include <QThreadPool>
 #include <QDir>
 #include <QSettings>
@@ -124,21 +125,36 @@ ImageRingList::~ImageRingList()
     m_thumbPool->waitForDone();
 }
 
-bool ImageRingList::setDir(const QString path, const QString &currentFile)
+bool ImageRingList::setDir(const QString path, const QString &currentFile, bool recursive)
 {
     QDir dir(path);
 
     if(dir.exists())
     {
-        QDir::SortFlags sortFlags = m_liveMode ? QDir::Time : m_sort | QDir::IgnoreCase;
-        if(m_reversed)sortFlags |= QDir::Reversed;
-        QStringList list = dir.entryList(m_nameFilter, QDir::Files | QDir::Readable, sortFlags);
         QStringList absolutePaths;
-        foreach(const QString &file, list)
+        std::function<void(const QString&)> scanDir = [&](const QString &path)
         {
-            absolutePaths.append(dir.absoluteFilePath(file));
-        }
-        setFiles(absolutePaths, m_liveMode ? list.first() : currentFile);
+            QDir dir(path);
+            QDir::SortFlags sortFlags = m_liveMode ? QDir::Time : m_sort | QDir::IgnoreCase;
+            if(m_reversed)sortFlags |= QDir::Reversed;
+
+            if(recursive)
+            {
+                QStringList dirs = dir.entryList(QDir::Readable | QDir::Dirs | QDir::NoDotAndDotDot, sortFlags);
+                for(const QString &subdir : dirs)
+                    scanDir(dir.absoluteFilePath(subdir));
+            }
+
+            QStringList list = dir.entryList(m_nameFilter, QDir::Files | QDir::Readable, sortFlags);
+            for(const QString &file : list)
+            {
+                absolutePaths.append(dir.absoluteFilePath(file));
+            }
+        };
+
+        scanDir(path);
+        qDebug() << absolutePaths.size();
+        setFiles(absolutePaths, m_liveMode ? absolutePaths.first() : currentFile);
 
         m_fileSystemWatcher.removePaths(m_fileSystemWatcher.directories());
         m_fileSystemWatcher.addPath(path);
@@ -151,7 +167,7 @@ void ImageRingList::setFile(const QString &file)
 {
     QFileInfo info(file);
     if(info.isDir())
-        setDir(file);
+        setDir(file, QString(), true);
     else
         setDir(info.absolutePath(), file);
 }
diff --git a/imageringlist.h b/imageringlist.h
index 49933d0..14eb886 100644
--- a/imageringlist.h
+++ b/imageringlist.h
@@ -69,7 +69,7 @@ class ImageRingList : public QAbstractItemModel
 public:
     explicit ImageRingList(Database *database, const QStringList &nameFilter, QObject *parent = 0);
     ~ImageRingList() override;
-    bool setDir(const QString path, const QString &currentFile = QString());
+    bool setDir(const QString path, const QString &currentFile = QString(), bool recursive = false);
     void setFile(const QString &file);
     ImagePtr currentImage();
     void setLiveMode(bool live);
diff --git a/imagescrollareagl.cpp b/imagescrollareagl.cpp
index dc1b54e..9def140 100644
--- a/imagescrollareagl.cpp
+++ b/imagescrollareagl.cpp
@@ -211,7 +211,7 @@ void ImageWidget::allocateThumbnails(const QStringList &paths)
     m_thumbnailTexture->create();
     m_thumbnailTexture->setFormat(QOpenGLTexture::RGB16_UNorm);
     m_thumbnailTexture->setSize(THUMB_SIZE, THUMB_SIZE);
-    m_thumbnailTexture->setLayers(paths.size());
+    m_thumbnailTexture->setLayers(std::min((int)paths.size(), m_maxArrayLayers));
     m_thumbnailTexture->allocateStorage();
 }
 
@@ -301,6 +301,9 @@ QImage ImageWidget::renderToImage()
 
 void ImageWidget::thumbnailLoaded(const Image *image)
 {
+    if(image->number() >= m_maxArrayLayers)
+        return;
+
     makeCurrent();
     const RawImage *raw = image->thumbnail();
     if(!raw || !raw->valid())return;
diff --git a/mainwindow.cpp b/mainwindow.cpp
index f478863..099c04c 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -144,6 +144,7 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
 
     QMenu *fileMenu = new QMenu(tr("File"), this);
     fileMenu->addAction(tr("Open"), this, SLOT(loadFile()), QKeySequence::Open);
+    fileMenu->addAction(tr("Open directory recursively"), this, &MainWindow::loadDir);
     fileMenu->addAction(tr("Save as"), this, SLOT(saveAs()), QKeySequence::Save);
     fileMenu->addSeparator();
     fileMenu->addAction(tr("Copy marked files"), this, SLOT(copyMarked()), Qt::Key_F5);
@@ -487,6 +488,20 @@ void MainWindow::loadFile(int row)
     m_ringList->loadFile(row);
 }
 
+void MainWindow::loadDir()
+{
+    QString dir = QFileDialog::getExistingDirectory(this,
+                                                tr("Open directory recursively"),
+                                                _lastDir);
+    if(!dir.isEmpty())
+    {
+        _lastDir = dir;
+        m_ringList->setDir(dir, QString(), true);
+        QSettings settings;
+        settings.setValue("mainwindow/lastdir", _lastDir);
+    }
+}
+
 void MainWindow::indexDir()
 {
     QString dir = QFileDialog::getExistingDirectory(this, tr("Index directory"), _lastDir, QFileDialog::ShowDirsOnly);
diff --git a/mainwindow.h b/mainwindow.h
index 5e766d0..b140eed 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -48,6 +48,7 @@ protected slots:
     void loadFile();
     void loadFile(const QString &path);
     void loadFile(int row);
+    void loadDir();
     void indexDir();
     void indexDir(const QString &dir);
     void reindex();