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QDeclarativeView3D black screen while loading 3D model

  • Hi all,

    I'm writing a QtQuickApplication, in which there should be a box showing a 3D model made in 3ds.
    I took a QML project online that does this job, using a .qml file with this simple piece of code:

    @import QtQuick 1.0
    import Qt3D 1.0
    import Qt3D.Shapes 1.0

    Viewport {
    Mesh {
    id: cube
    source: "cube.3ds"

    Item3D {
        mesh: cube


    I run this qml project, and everything works fine.

    I decide then to import this "sample.qml" file inside my Desktop application, as explained in To do so, I promote a QGraphicsView to a QDeclarativeView3D, and in the main cpp file I write:


    where ui->graphicsView is obviously the QDeclarativeView3D widget.

    Now, there's the problem: I run the application, but the QDeclarativeView3D remains always black, even "mousing" over it.
    I also tried giving graphicsView an inexisting file as source, but in that case the QDeclarativeView3D is white: then, is almost sure that the qml file is loaded. I wonder why it can't be shown.

    Any suggestion will be appreciated!

    Thanks in advance,

  • Have you tried running with -graphicssystem opengl?

  • Thanks for suggestion. Unfortunately, it doesn't work...

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