PNG file is not rendered properly when using as texture for QBrush

[skeletor]

Hi all,

I would like to add a rectangle with a textured brush pattern to a QGraphicsScene. However, the rendering is not working out for some reason.

Here's the code where I add the rectangle to the scene.

QPixmap pixmap = QPixmap(":/images/TexturePattern.png");
    QBrush brush = QBrush(QPixmap(pixmap));
 
    mainRect = new QGraphicsRectItem(0,0,960,1300);
    mainRect->setBrush(brush);
    mainRect->setPen(QPen(QBrush(QColor("Gray")), 3));
    mainRect->setVisible(true);
    addItem(mainRect);

QPixmap pixmap = QPixmap(":/images/TexturePattern.png");
    QBrush brush = QBrush(QPixmap(pixmap));

    mainRect = new QGraphicsRectItem(0,0,960,1300);
    mainRect->setBrush(brush);
    mainRect->setPen(QPen(QBrush(QColor("Gray")), 3));
    mainRect->setVisible(true);
    addItem(mainRect);

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Here's a piece of the resulting image:
BadPattern.png

I substituted my image into the Painting example Basic Shapes, (substituted texturePattern.png for Brick.png) and it seems to render just fine:
OkPattern.jpg

Other than their using a Widget and I'm using a QGraphicsScene, I can't seem to find any difference in the code. Does anyone know why?

Thanks in advance.