Is it possible to change the camera parameters of the visual world in rviz?

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I want to overlay a live-camera feed from a calibrated monocular camera, with some objects (marker) in rviz. As it turns out, the vanishing point of my cameraimage and the rendered cube (for example) are different. This can be seen when trying to overlay a grid over an filmed checkboard.

Is it possible to tell rviz the camera matrix/ parameters, with which it should render? Or do you have other ideas?