I`m using QMainWindow with
setStyleSheet("background : transparent;" );
setWindowFlags(Qt::FramelessWindowHint);
setAttribute(Qt::WA_TranslucentBackground, true);
And I create QDeclarativeView with viewport as QGlWidget. After compilation, I see a bug. The window is not is rendered( This causes the third line. Without QGlWidget window is rendering.
EDIT: This is minimal reproduce link