bool PickBoundingVolumeJob::runHelper()
{
    //...
    PickingUtils::ViewportCameraAreaGatherer vcaGatherer;
    const QVector<PickingUtils::ViewportCameraAreaTriplet> vcaTriplets = vcaGatherer.gather(m_frameGraphRoot);
    //...
    for (const QMouseEvent &event : mouseEvents) {
        for (const PickingUtils::ViewportCameraAreaTriplet &vca : vcaTriplets) {
            QRay3D ray = rayForViewportAndCamera(vca.area, event.pos(), vca.viewport, vca.cameraId);
            // use ray for picking

          // QUESTIONS:
          // 1 - Is event from the current surface ?
          // 2 - Is event.pos() within the current viewport ?
          // 3 - Is this area of the viewport not hidden by another viewport ? (turns out we can't have a viewport on top of another, like a minimap in a game, viewports entities collide if you try to do it, which look like another bug [but i may have miss something in the frame graph]...)

        }
    }
}