Qt 3D: How to draw a cube with 6 different textures on each face ?

[SamurayH]

Hi,
I'm new to Qt 3D (C++), and while I'm training with my first 3D app, I couldn't achieve the following:
Creating a cube with 6 different textures on each face... Until now, this is what I've tried:

    Qt3DExtras::QTextureMaterial *textureMaterial = new Qt3DExtras::QTextureMaterial();
    Qt3DRender::QTextureCubeMap *cubMap = new Qt3DRender::QTextureCubeMap();

    Qt3DRender::QTextureImage *f1 = new Qt3DRender::QTextureImage();
    Qt3DRender::QTextureImage *f2 = new Qt3DRender::QTextureImage();
    Qt3DRender::QTextureImage *f3 = new Qt3DRender::QTextureImage();
    Qt3DRender::QTextureImage *f4 = new Qt3DRender::QTextureImage();
    Qt3DRender::QTextureImage *f5 = new Qt3DRender::QTextureImage();
    Qt3DRender::QTextureImage *f6 = new Qt3DRender::QTextureImage();

    f1->setSource(QUrl("qrc:/rc/images/1.png"));
    f1->setFace(Qt3DRender::QAbstractTexture::CubeMapNegativeX);
    f2->setSource(QUrl("qrc:/rc/images/2.png"));
    f2->setFace(Qt3DRender::QAbstractTexture::CubeMapPositiveX);
    f3->setSource(QUrl("qrc:/rc/images/3.png"));
    f3->setFace(Qt3DRender::QAbstractTexture::CubeMapNegativeY);
    f4->setSource(QUrl("qrc:/rc/images/4.png"));
    f4->setFace(Qt3DRender::QAbstractTexture::CubeMapPositiveY);
    f5->setSource(QUrl("qrc:/rc/images/5.png"));
    f5->setFace(Qt3DRender::QAbstractTexture::CubeMapNegativeZ);
    f6->setSource(QUrl("qrc:/rc/images/6.png"));
    f6->setFace(Qt3DRender::QAbstractTexture::CubeMapPositiveZ);

    cubMap->addTextureImage(f1);
    cubMap->addTextureImage(f2);
    cubMap->addTextureImage(f3);
    cubMap->addTextureImage(f4);
    cubMap->addTextureImage(f5);
    cubMap->addTextureImage(f6);

    textureMaterial->setTexture(cubMap);

But it gives me a black cube.
I've googled for some examples, but all I find is OpenGl, which I'm not familiar with. I believe it's possible using Qt C++ Classes only...

I would appreciate your help.