diff --git a/effects/slidingpopups/slidingpopups.cpp b/effects/slidingpopups/slidingpopups.cpp
index 1312d6b0a5..7e55ac28ef 100644
--- a/effects/slidingpopups/slidingpopups.cpp
+++ b/effects/slidingpopups/slidingpopups.cpp
@@ -103,76 +103,6 @@ void SlidingPopupsEffect::prePaintWindow(EffectWindow* w, WindowPrePaintData& da
     data.setTransformed();
     w->enablePainting(EffectWindow::PAINT_DISABLED | EffectWindow::PAINT_DISABLED_BY_DELETE);
 
-    const int start = mWindowsData[ w ].start;
-    if (start != 0) {
-        const QRect screenRect = effects->clientArea(FullScreenArea, w->screen(), effects->currentDesktop());
-        const QRect geo = w->expandedGeometry();
-        const qreal t = (*animationIt).timeLine.value();
-        // filter out window quads, but only if the window does not start from the edge
-        int slideLength;
-        if (mWindowsData[ w ].slideLength > 0) {
-            slideLength = mWindowsData[ w ].slideLength;
-        } else {
-            slideLength = mSlideLength;
-        }
-
-        switch(mWindowsData[ w ].from) {
-        case West: {
-            const double splitPoint = geo.width() - (geo.x() + geo.width() - screenRect.x() - start) + interpolate(qMin(geo.width(), slideLength), 0, t);
-            data.quads = data.quads.splitAtX(splitPoint);
-            WindowQuadList filtered;
-            filtered.reserve(data.quads.count());
-            for (const WindowQuad &quad : qAsConst(data.quads)) {
-                if (quad.left() >= splitPoint) {
-                    filtered << quad;
-                }
-            }
-            data.quads = filtered;
-            break;
-        }
-        case North: {
-            const double splitPoint = geo.height() - (geo.y() + geo.height() - screenRect.y() - start) + interpolate(qMin(geo.height(), slideLength), 0, t);
-            data.quads = data.quads.splitAtY(splitPoint);
-            WindowQuadList filtered;
-            filtered.reserve(data.quads.count());
-            for (const WindowQuad &quad : qAsConst(data.quads)) {
-                if (quad.top() >= splitPoint) {
-                    filtered << quad;
-                }
-            }
-            data.quads = filtered;
-            break;
-        }
-        case East: {
-            const double splitPoint = screenRect.x() + screenRect.width() - geo.x() - start - interpolate(qMin(geo.width(), slideLength), 0, t);
-            data.quads = data.quads.splitAtX(splitPoint);
-            WindowQuadList filtered;
-            filtered.reserve(data.quads.count());
-            for (const WindowQuad &quad : qAsConst(data.quads)) {
-                if (quad.right() <= splitPoint) {
-                    filtered << quad;
-                }
-            }
-            data.quads = filtered;
-            break;
-        }
-        case South:
-        default: {
-            const double splitPoint = screenRect.y() + screenRect.height() - geo.y() - start - interpolate(qMin(geo.height(), slideLength), 0, t);
-            data.quads = data.quads.splitAtY(splitPoint);
-            WindowQuadList filtered;
-            filtered.reserve(data.quads.count());
-            for (const WindowQuad &quad : qAsConst(data.quads)) {
-                if (quad.bottom() <= splitPoint) {
-                    filtered << quad;
-                }
-            }
-            data.quads = filtered;
-            break;
-        }
-        }
-    }
-
     effects->prePaintWindow(w, data, time);
 }