diff --git a/examples/dialog/dialog.cpp b/examples/dialog/dialog.cpp
index 6c600ca..e72966e 100644
--- a/examples/dialog/dialog.cpp
+++ b/examples/dialog/dialog.cpp
@@ -39,16 +39,23 @@ Dialog::~Dialog() = default;
 void Dialog::closeEvent(QCloseEvent *event)
 {
     if (!parent()) {
-        Settings::set({}, kGeometry, geometry());
-        Settings::set({}, kDevicePixelRatio, devicePixelRatioF());
+        const QString id = objectName();
+        Settings::set(id, kGeometry, geometry());
+        Settings::set(id, kDevicePixelRatio, devicePixelRatioF());
     }
     FramelessDialog::closeEvent(event);
 }
 
 void Dialog::setupUi()
 {
-    setWindowTitle(tr("Qt Dialog demo"));
+    setWindowTitle(tr("FramelessHelper demo application - QDialog"));
     setWindowIcon(QFileIconProvider().icon(QFileIconProvider::Computer));
+    connect(this, &Dialog::objectNameChanged, this, [this](const QString &name){
+        if (name.isEmpty()) {
+            return;
+        }
+        setWindowTitle(windowTitle() + FRAMELESSHELPER_STRING_LITERAL(" [%1]").arg(name));
+    });
 
     titleBar = new StandardTitleBar(this);
     titleBar->setWindowIconVisible(true);
@@ -142,9 +149,10 @@ void Dialog::waitReady()
 {
     FramelessWidgetsHelper *helper = FramelessWidgetsHelper::get(this);
     helper->waitForReady();
-    const auto savedGeometry = Settings::get<QRect>({}, kGeometry);
+    const QString id = objectName();
+    const auto savedGeometry = Settings::get<QRect>(id, kGeometry);
     if (savedGeometry.isValid() && !parent()) {
-        const auto savedDpr = Settings::get<qreal>({}, kDevicePixelRatio);
+        const auto savedDpr = Settings::get<qreal>(id, kDevicePixelRatio);
         // Qt doesn't support dpr < 1.
         const qreal oldDpr = std::max(savedDpr, qreal(1));
         const qreal scale = (devicePixelRatioF() / oldDpr);
diff --git a/examples/dialog/main.cpp b/examples/dialog/main.cpp
index df2c996..d81af6a 100644
--- a/examples/dialog/main.cpp
+++ b/examples/dialog/main.cpp
@@ -29,6 +29,12 @@
 
 FRAMELESSHELPER_USE_NAMESPACE
 
+#define CREATE_WINDOW(Name) \
+    const auto Name = std::make_unique<Dialog>(); \
+    Name->setObjectName(FRAMELESSHELPER_STRING_LITERAL(#Name)); \
+    Name->waitReady(); \
+    Name->show();
+
 int main(int argc, char *argv[])
 {
     Log::setup(FRAMELESSHELPER_STRING_LITERAL("dialog"));
@@ -51,11 +57,11 @@ int main(int argc, char *argv[])
     FramelessHelper::Core::setApplicationOSThemeAware();
 
     FramelessConfig::instance()->set(Global::Option::EnableBlurBehindWindow);
-    FramelessConfig::instance()->set(Global::Option::DisableLazyInitializationForMicaMaterial);
+    //FramelessConfig::instance()->set(Global::Option::DisableLazyInitializationForMicaMaterial);
 
-    const auto dialog = std::make_unique<Dialog>();
-    dialog->waitReady();
-    dialog->show();
+    CREATE_WINDOW(dialog1)
+    CREATE_WINDOW(dialog2)
+    CREATE_WINDOW(dialog3)
 
     return QCoreApplication::exec();
 }
diff --git a/examples/mainwindow/main.cpp b/examples/mainwindow/main.cpp
index a427d1f..efc3291 100644
--- a/examples/mainwindow/main.cpp
+++ b/examples/mainwindow/main.cpp
@@ -29,6 +29,12 @@
 
 FRAMELESSHELPER_USE_NAMESPACE
 
+#define CREATE_WINDOW(Name) \
+    const auto Name = std::make_unique<MainWindow>(); \
+    Name->setObjectName(FRAMELESSHELPER_STRING_LITERAL(#Name)); \
+    Name->waitReady(); \
+    Name->show();
+
 int main(int argc, char *argv[])
 {
     Log::setup(FRAMELESSHELPER_STRING_LITERAL("mainwindow"));
@@ -51,11 +57,11 @@ int main(int argc, char *argv[])
     FramelessHelper::Core::setApplicationOSThemeAware();
 
     FramelessConfig::instance()->set(Global::Option::EnableBlurBehindWindow);
-    FramelessConfig::instance()->set(Global::Option::DisableLazyInitializationForMicaMaterial);
+    //FramelessConfig::instance()->set(Global::Option::DisableLazyInitializationForMicaMaterial);
 
-    const auto mainWindow = std::make_unique<MainWindow>();
-    mainWindow->waitReady();
-    mainWindow->show();
+    CREATE_WINDOW(mainWindow1)
+    CREATE_WINDOW(mainWindow2)
+    CREATE_WINDOW(mainWindow3)
 
     return QCoreApplication::exec();
 }
diff --git a/examples/mainwindow/mainwindow.cpp b/examples/mainwindow/mainwindow.cpp
index 5a5e490..c4aad19 100644
--- a/examples/mainwindow/mainwindow.cpp
+++ b/examples/mainwindow/mainwindow.cpp
@@ -60,9 +60,10 @@ MainWindow::~MainWindow() = default;
 void MainWindow::closeEvent(QCloseEvent *event)
 {
     if (!parent()) {
-        Settings::set({}, kGeometry, geometry());
-        Settings::set({}, kState, saveState());
-        Settings::set({}, kDevicePixelRatio, devicePixelRatioF());
+        const QString id = objectName();
+        Settings::set(id, kGeometry, geometry());
+        Settings::set(id, kState, saveState());
+        Settings::set(id, kDevicePixelRatio, devicePixelRatioF());
     }
     FramelessMainWindow::closeEvent(event);
 }
@@ -108,8 +109,14 @@ QMenuBar::item:pressed {
 #endif // Q_OS_MACOS
     helper->setHitTestVisible(mb); // IMPORTANT!
 
-    setWindowTitle(tr("FramelessHelper demo application - Qt MainWindow"));
+    setWindowTitle(tr("FramelessHelper demo application - QMainWindow"));
     setWindowIcon(QFileIconProvider().icon(QFileIconProvider::Computer));
+    connect(this, &MainWindow::objectNameChanged, this, [this](const QString &name){
+        if (name.isEmpty()) {
+            return;
+        }
+        setWindowTitle(windowTitle() + FRAMELESSHELPER_STRING_LITERAL(" [%1]").arg(name));
+    });
     connect(m_mainWindow->pushButton, &QPushButton::clicked, this, [this]{
         const auto dialog = new Dialog(this);
         dialog->waitReady();
@@ -128,9 +135,10 @@ void MainWindow::waitReady()
 {
     FramelessWidgetsHelper *helper = FramelessWidgetsHelper::get(this);
     helper->waitForReady();
-    const auto savedGeometry = Settings::get<QRect>({}, kGeometry);
+    const QString id = objectName();
+    const auto savedGeometry = Settings::get<QRect>(id, kGeometry);
     if (savedGeometry.isValid() && !parent()) {
-        const auto savedDpr = Settings::get<qreal>({}, kDevicePixelRatio);
+        const auto savedDpr = Settings::get<qreal>(id, kDevicePixelRatio);
         // Qt doesn't support dpr < 1.
         const qreal oldDpr = std::max(savedDpr, qreal(1));
         const qreal scale = (devicePixelRatioF() / oldDpr);
@@ -138,7 +146,7 @@ void MainWindow::waitReady()
     } else {
         helper->moveWindowToDesktopCenter();
     }
-    const QByteArray savedState = Settings::get<QByteArray>({}, kState);
+    const QByteArray savedState = Settings::get<QByteArray>(id, kState);
     if (!savedState.isEmpty() && !parent()) {
         restoreState(savedState);
     }
diff --git a/examples/widget/main.cpp b/examples/widget/main.cpp
index 01ae825..38cf27e 100644
--- a/examples/widget/main.cpp
+++ b/examples/widget/main.cpp
@@ -59,10 +59,9 @@ int main(int argc, char *argv[])
     FramelessConfig::instance()->set(Global::Option::EnableBlurBehindWindow);
     //FramelessConfig::instance()->set(Global::Option::DisableLazyInitializationForMicaMaterial);
 
-    CREATE_WINDOW(window1)
-    CREATE_WINDOW(window2)
-    CREATE_WINDOW(window3)
-    CREATE_WINDOW(window4)
+    CREATE_WINDOW(widget1)
+    CREATE_WINDOW(widget2)
+    CREATE_WINDOW(widget3)
 
     return QCoreApplication::exec();
 }
diff --git a/examples/widget/widget.cpp b/examples/widget/widget.cpp
index 52d2d43..07f1d87 100644
--- a/examples/widget/widget.cpp
+++ b/examples/widget/widget.cpp
@@ -80,7 +80,7 @@ void Widget::closeEvent(QCloseEvent *event)
 
 void Widget::initialize()
 {
-    setWindowTitle(tr("FramelessHelper demo application - Qt Widgets"));
+    setWindowTitle(tr("FramelessHelper demo application - QWidget"));
     setWindowIcon(QFileIconProvider().icon(QFileIconProvider::Computer));
     resize(800, 600);
     m_titleBar = new StandardTitleBar(this);
diff --git a/include/FramelessHelper/Core/private/micamaterial_p.h b/include/FramelessHelper/Core/private/micamaterial_p.h
index f8853e1..25f1c4d 100644
--- a/include/FramelessHelper/Core/private/micamaterial_p.h
+++ b/include/FramelessHelper/Core/private/micamaterial_p.h
@@ -65,8 +65,8 @@ private:
     QBrush micaBrush = {};
     bool initialized = false;
     struct {
-        qreal x = 0;
-        qreal y = 0;
+        qreal horizontal = 0;
+        qreal vertical = 0;
     } transform = {};
 };
 
diff --git a/src/core/micamaterial.cpp b/src/core/micamaterial.cpp
index 3627d76..4508d22 100644
--- a/src/core/micamaterial.cpp
+++ b/src/core/micamaterial.cpp
@@ -29,6 +29,7 @@
 #include "framelessconfig_p.h"
 #include <QtCore/qsysinfo.h>
 #include <QtCore/qloggingcategory.h>
+#include <QtCore/qmutex.h>
 #include <QtGui/qpixmap.h>
 #include <QtGui/qimage.h>
 #include <QtGui/qimagereader.h>
@@ -77,6 +78,7 @@ struct MicaMaterialData
 {
     QPixmap blurredWallpaper = {};
     bool graphicsResourcesReady = false;
+    QMutex mutex;
 };
 
 Q_GLOBAL_STATIC(MicaMaterialData, g_micaMaterialData)
@@ -529,15 +531,25 @@ const MicaMaterialPrivate *MicaMaterialPrivate::get(const MicaMaterial *q)
 
 void MicaMaterialPrivate::maybeGenerateBlurredWallpaper(const bool force)
 {
+    g_micaMaterialData()->mutex.lock();
     if (!g_micaMaterialData()->blurredWallpaper.isNull() && !force) {
+        g_micaMaterialData()->mutex.unlock();
         return;
     }
+    g_micaMaterialData()->mutex.unlock();
+    // ### FIXME: Ideally, we should not use virtual desktop size here.
     QSize monitorSize = QGuiApplication::primaryScreen()->virtualSize();
     if (monitorSize.isEmpty()) {
         WARNING << "Failed to retrieve the monitor size. Using default size (1920x1080) instead ...";
         monitorSize = kMaximumPictureSize;
     }
     const QSize imageSize = (monitorSize > kMaximumPictureSize ? kMaximumPictureSize : monitorSize);
+    if (imageSize == monitorSize) {
+        transform = {};
+    } else {
+        transform.horizontal = (qreal(imageSize.width()) / qreal(monitorSize.width()));
+        transform.vertical = (qreal(imageSize.height()) / qreal(monitorSize.height()));
+    }
     const QString wallpaperFilePath = Utils::getWallpaperFilePath();
     if (wallpaperFilePath.isEmpty()) {
         WARNING << "Failed to retrieve the wallpaper file path.";
@@ -554,23 +566,17 @@ void MicaMaterialPrivate::maybeGenerateBlurredWallpaper(const bool force)
         return;
     }
     const QSize correctedSize = (actualSize > kMaximumPictureSize ? kMaximumPictureSize : actualSize);
-    if (actualSize == correctedSize) {
-        transform = {};
-    } else {
+    if (correctedSize != actualSize) {
         DEBUG << "The wallpaper picture size is greater than 1920x1080, it will be shrinked to reduce memory consumption.";
         reader.setScaledSize(correctedSize);
-        transform.x = qreal(correctedSize.width()) / qreal(actualSize.width());
-        transform.y = qreal(correctedSize.height()) / qreal(actualSize.height());
     }
     QImage image(correctedSize, kDefaultImageFormat);
     if (!reader.read(&image)) {
         WARNING << "Failed to read the wallpaper image:" << reader.errorString();
-        transform = {};
         return;
     }
     if (image.isNull()) {
         WARNING << "The obtained image data is null.";
-        transform = {};
         return;
     }
     WallpaperAspectStyle aspectStyle = Utils::getWallpaperAspectStyle();
@@ -607,6 +613,7 @@ void MicaMaterialPrivate::maybeGenerateBlurredWallpaper(const bool force)
         const QRect rect = alignedRect(Qt::LeftToRight, Qt::AlignCenter, image.size(), desktopRect);
         bufferPainter.drawImage(rect.topLeft(), image);
     }
+    g_micaMaterialData()->mutex.lock();
     g_micaMaterialData()->blurredWallpaper = QPixmap(imageSize);
     g_micaMaterialData()->blurredWallpaper.fill(kDefaultTransparentColor);
     QPainter painter(&g_micaMaterialData()->blurredWallpaper);
@@ -617,6 +624,7 @@ void MicaMaterialPrivate::maybeGenerateBlurredWallpaper(const bool force)
 #else // !FRAMELESSHELPER_CORE_NO_PRIVATE
     qt_blurImage(&painter, buffer, kDefaultBlurRadius, true, false);
 #endif // FRAMELESSHELPER_CORE_NO_PRIVATE
+    g_micaMaterialData()->mutex.unlock();
     if (initialized) {
         Q_Q(MicaMaterial);
         Q_EMIT q->shouldRedraw();
@@ -661,18 +669,19 @@ void MicaMaterialPrivate::paint(QPainter *painter, const QSize &size, const QPoi
     static constexpr const QPointF originPoint = {0, 0};
     QPointF correctedPos = pos;
     QSizeF correctedSize = size;
-    if (!qFuzzyIsNull(transform.x) && (transform.x > qreal(0)) && !qFuzzyCompare(transform.x, qreal(1))) {
-        correctedPos.setX(correctedPos.x() * transform.x);
-        correctedSize.setWidth(correctedSize.width() * transform.x);
+    if (!qFuzzyIsNull(transform.horizontal) && (transform.horizontal > qreal(0)) && !qFuzzyCompare(transform.horizontal, qreal(1))) {
+        correctedPos.setX(correctedPos.x() * transform.horizontal);
+        correctedSize.setWidth(correctedSize.width() * transform.horizontal);
     }
-    if (!qFuzzyIsNull(transform.y) && (transform.y > qreal(0)) && !qFuzzyCompare(transform.y, qreal(1))) {
-        correctedPos.setY(correctedPos.y() * transform.y);
-        correctedSize.setHeight(correctedSize.height() * transform.y);
+    if (!qFuzzyIsNull(transform.vertical) && (transform.vertical > qreal(0)) && !qFuzzyCompare(transform.vertical, qreal(1))) {
+        correctedPos.setY(correctedPos.y() * transform.vertical);
+        correctedSize.setHeight(correctedSize.height() * transform.vertical);
     }
     painter->save();
     painter->setRenderHints(QPainter::Antialiasing |
         QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform);
     if (active) {
+        const QMutexLocker locker(&g_micaMaterialData()->mutex);
         painter->drawPixmap(originPoint, g_micaMaterialData()->blurredWallpaper, QRectF{correctedPos, correctedSize});
     }
     painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
@@ -715,10 +724,13 @@ void MicaMaterialPrivate::initialize()
 
 void MicaMaterialPrivate::prepareGraphicsResources()
 {
+    g_micaMaterialData()->mutex.lock();
     if (g_micaMaterialData()->graphicsResourcesReady) {
+        g_micaMaterialData()->mutex.unlock();
         return;
     }
     g_micaMaterialData()->graphicsResourcesReady = true;
+    g_micaMaterialData()->mutex.unlock();
     maybeGenerateBlurredWallpaper();
 }