In conjunction with the medical treatment liquor to be performed on the morphological target is typically data about the physical characteristics of the morphological destination (physical feature), is received. And for the health care professional to perform a medical treatment liquor view (view) of a chemical the virtual image of the overlay in the form of the physical characteristic target is rendered, this rendering operation for generating the virtual image of a physical characteristic on the basis of the representative data; so that the scene visualization of physical characteristics for the morphological possible target in the virtual image according to the one or more reference points on the morphological subject, comprises an operation for rendering a virtual image of the physical features in the view.