diff --git a/src/effects/slide/slide.cpp b/src/effects/slide/slide.cpp
index c9cc15c916..87880fd2dd 100644
--- a/src/effects/slide/slide.cpp
+++ b/src/effects/slide/slide.cpp
@@ -62,6 +62,25 @@ void SlideEffect::reconfigure(ReconfigureFlags)
     m_slideBackground = SlideConfig::slideBackground();
 }
 
+inline QRegion buildClipRegion(const QPoint &pos, int w, int h)
+{
+    const QSize screenSize = effects->virtualScreenSize();
+    QRegion r = QRect(pos, screenSize);
+    if (effects->optionRollOverDesktops()) {
+        r |= (r & QRect(-w, 0, w, h)).translated(w, 0);  // W
+        r |= (r & QRect(w, 0, w, h)).translated(-w, 0);  // E
+
+        r |= (r & QRect(0, -h, w, h)).translated(0, h);  // N
+        r |= (r & QRect(0, h, w, h)).translated(0, -h);  // S
+
+        r |= (r & QRect(-w, -h, w, h)).translated(w, h); // NW
+        r |= (r & QRect(w, -h, w, h)).translated(-w, h); // NE
+        r |= (r & QRect(w, h, w, h)).translated(-w, -h); // SE
+        r |= (r & QRect(-w, h, w, h)).translated(w, -h); // SW
+    }
+    return r;
+}
+
 void SlideEffect::prePaintScreen(ScreenPrePaintData &data, std::chrono::milliseconds presentTime)
 {
     std::chrono::milliseconds delta = std::chrono::milliseconds::zero();
@@ -69,11 +88,31 @@ void SlideEffect::prePaintScreen(ScreenPrePaintData &data, std::chrono::millisec
         delta = presentTime - m_lastPresentTime;
     }
     m_lastPresentTime = presentTime;
-
     m_timeLine.update(delta);
 
-    data.mask |= PAINT_SCREEN_TRANSFORMED
-              |  PAINT_SCREEN_BACKGROUND_FIRST;
+    const int w = workspaceWidth();
+    const int h = workspaceHeight();
+
+    // When "Desktop navigation wraps around" checkbox is checked, currentPos
+    // can be outside the rectangle Rect{x:-w, y:-h, width:2*w, height: 2*h},
+    // so we map currentPos back to the rect.
+    m_paintCtx.currentPos = m_startPos + m_diff * m_timeLine.value();
+    if (effects->optionRollOverDesktops()) {
+        m_paintCtx.currentPos.setX(m_paintCtx.currentPos.x() % w);
+        m_paintCtx.currentPos.setY(m_paintCtx.currentPos.y() % h);
+    }
+
+    m_paintCtx.visibleDesktops.clear();
+    const QRegion clipRegion = buildClipRegion(m_paintCtx.currentPos, w, h);
+    for (int i = 1; i <= effects->numberOfDesktops(); i++) {
+        const QRect desktopGeo = desktopGeometry(i);
+        if (!clipRegion.contains(desktopGeo)) {
+            continue;
+        }
+        m_paintCtx.visibleDesktops << i;
+    }
+
+    data.mask |= PAINT_SCREEN_TRANSFORMED | PAINT_SCREEN_BACKGROUND_FIRST;
 
     effects->prePaintScreen(data, presentTime);
 }
@@ -104,52 +143,12 @@ inline void wrapDiff(QPoint &diff, int w, int h)
     }
 }
 
-inline QRegion buildClipRegion(const QPoint &pos, int w, int h)
-{
-    const QSize screenSize = effects->virtualScreenSize();
-    QRegion r = QRect(pos, screenSize);
-    if (effects->optionRollOverDesktops()) {
-        r |= (r & QRect(-w, 0, w, h)).translated(w, 0);  // W
-        r |= (r & QRect(w, 0, w, h)).translated(-w, 0);  // E
-
-        r |= (r & QRect(0, -h, w, h)).translated(0, h);  // N
-        r |= (r & QRect(0, h, w, h)).translated(0, -h);  // S
-
-        r |= (r & QRect(-w, -h, w, h)).translated(w, h); // NW
-        r |= (r & QRect(w, -h, w, h)).translated(-w, h); // NE
-        r |= (r & QRect(w, h, w, h)).translated(-w, -h); // SE
-        r |= (r & QRect(-w, h, w, h)).translated(w, -h); // SW
-    }
-    return r;
-}
-
 void SlideEffect::paintScreen(int mask, const QRegion &region, ScreenPaintData &data)
 {
     const bool wrap = effects->optionRollOverDesktops();
     const int w = workspaceWidth();
     const int h = workspaceHeight();
 
-    QPoint currentPos = m_startPos + m_diff * m_timeLine.value();
-
-    // When "Desktop navigation wraps around" checkbox is checked, currentPos
-    // can be outside the rectangle Rect{x:-w, y:-h, width:2*w, height: 2*h},
-    // so we map currentPos back to the rect.
-    if (wrap) {
-        currentPos.setX(currentPos.x() % w);
-        currentPos.setY(currentPos.y() % h);
-    }
-
-    QVector<int> visibleDesktops;
-    visibleDesktops.reserve(4); // 4 - maximum number of visible desktops
-    const QRegion clipRegion = buildClipRegion(currentPos, w, h);
-    for (int i = 1; i <= effects->numberOfDesktops(); i++) {
-        const QRect desktopGeo = desktopGeometry(i);
-        if (!clipRegion.contains(desktopGeo)) {
-            continue;
-        }
-        visibleDesktops << i;
-    }
-
     // When we enter a virtual desktop that has a window in fullscreen mode,
     // stacking order is fine. When we leave a virtual desktop that has
     // a window in fullscreen mode, stacking order is no longer valid
@@ -173,11 +172,11 @@ void SlideEffect::paintScreen(int mask, const QRegion &region, ScreenPaintData &
     // Windows, such as docks or keep-above windows, are painted in
     // the last pass so they are above other windows.
     m_paintCtx.firstPass = true;
-    const int lastDesktop = visibleDesktops.last();
-    for (int desktop : qAsConst(visibleDesktops)) {
+    const int lastDesktop = m_paintCtx.visibleDesktops.last();
+    for (int desktop : qAsConst(m_paintCtx.visibleDesktops)) {
         m_paintCtx.desktop = desktop;
         m_paintCtx.lastPass = (lastDesktop == desktop);
-        m_paintCtx.translation = desktopCoords(desktop) - currentPos;
+        m_paintCtx.translation = desktopCoords(desktop) - m_paintCtx.currentPos;
         if (wrap) {
             wrapDiff(m_paintCtx.translation, w, h);
         }
@@ -202,10 +201,8 @@ bool SlideEffect::isTranslated(const EffectWindow *w) const
         return false;
     } else if (w == m_movingWindow) {
         return false;
-    } else if (w->isOnDesktop(m_paintCtx.desktop)) {
-        return true;
     }
-    return false;
+    return true;
 }
 
 /**
@@ -251,20 +248,22 @@ bool SlideEffect::isPainted(const EffectWindow *w) const
 
 void SlideEffect::prePaintWindow(EffectWindow *w, WindowPrePaintData &data, std::chrono::milliseconds presentTime)
 {
-    const bool painted = isPainted(w);
-    if (painted) {
-        w->enablePainting(EffectWindow::PAINT_DISABLED_BY_DESKTOP);
-    } else {
-        w->disablePainting(EffectWindow::PAINT_DISABLED_BY_DESKTOP);
-    }
-    if (painted && isTranslated(w)) {
-        data.setTransformed();
+    for (const auto &desktop : std::as_const(m_paintCtx.visibleDesktops)) {
+        if (w->isOnDesktop(desktop)) {
+            w->enablePainting(EffectWindow::PAINT_DISABLED_BY_DESKTOP);
+            data.setTransformed();
+            break;
+        }
     }
+
     effects->prePaintWindow(w, data, presentTime);
 }
 
 void SlideEffect::paintWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data)
 {
+    if (!isPainted(w)) {
+        return;
+    }
     if (isTranslated(w)) {
         data += m_paintCtx.translation;
     }
diff --git a/src/effects/slide/slide.h b/src/effects/slide/slide.h
index c7c7ef572e..328c61f9bb 100644
--- a/src/effects/slide/slide.h
+++ b/src/effects/slide/slide.h
@@ -93,6 +93,8 @@ private:
         bool lastPass;
         QPoint translation;
 
+        QPoint currentPos;
+        QVector<int> visibleDesktops;
         EffectWindowList fullscreenWindows;
     } m_paintCtx;