diff --git a/libkwineffects/kwinglutils.h b/libkwineffects/kwinglutils.h
--- a/libkwineffects/kwinglutils.h
+++ b/libkwineffects/kwinglutils.h
@@ -544,6 +544,15 @@
         return s_virtualScreenScale;
     }
 
+    /**
+     * The framebuffer of KWin's OpenGL window or other object currently being rendered to
+     *
+     * @since 5.18
+     */
+    static void setKWinFramebuffer(GLuint fb) {
+        s_kwinFramebuffer = fb;
+    }
+
 
 protected:
     void initFBO();
@@ -559,6 +568,7 @@
     static QRect s_virtualScreenGeometry;
     static qreal s_virtualScreenScale;
     static GLint s_virtualScreenViewport[4];
+    static GLuint s_kwinFramebuffer;
 
     GLTexture mTexture;
     bool mValid;
diff --git a/libkwineffects/kwinglutils.cpp b/libkwineffects/kwinglutils.cpp
--- a/libkwineffects/kwinglutils.cpp
+++ b/libkwineffects/kwinglutils.cpp
@@ -1050,6 +1050,7 @@
 QRect GLRenderTarget::s_virtualScreenGeometry;
 qreal GLRenderTarget::s_virtualScreenScale = 1.0;
 GLint GLRenderTarget::s_virtualScreenViewport[4];
+GLuint GLRenderTarget::s_kwinFramebuffer = 0;
 
 void GLRenderTarget::initStatic()
 {
@@ -1174,7 +1175,7 @@
         return false;
     }
 
-    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    glBindFramebuffer(GL_FRAMEBUFFER, s_kwinFramebuffer);
     mTexture.setDirty();
 
     return true;
@@ -1245,15 +1246,15 @@
 #if DEBUG_GLRENDERTARGET
     if ((err = glGetError()) != GL_NO_ERROR) {
         qCCritical(LIBKWINGLUTILS) << "glFramebufferTexture2D failed: " << formatGLError(err);
-        glBindFramebuffer(GL_FRAMEBUFFER, 0);
+        glBindFramebuffer(GL_FRAMEBUFFER, s_kwinFramebuffer);
         glDeleteFramebuffers(1, &mFramebuffer);
         return;
     }
 #endif
 
     const GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
 
-    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    glBindFramebuffer(GL_FRAMEBUFFER, s_kwinFramebuffer);
 
     if (status != GL_FRAMEBUFFER_COMPLETE) {
         // We have an incomplete framebuffer, consider it invalid
@@ -1280,7 +1281,7 @@
 
     GLRenderTarget::pushRenderTarget(this);
     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mFramebuffer);
-    glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+    glBindFramebuffer(GL_READ_FRAMEBUFFER, s_kwinFramebuffer);
     const QRect s = source.isNull() ? s_virtualScreenGeometry : source;
     const QRect d = destination.isNull() ? QRect(0, 0, mTexture.width(), mTexture.height()) : destination;