Minkowski model is constructed by drawing two-dimensional isovists along a given path relative to a given environment, where space is read in the horizontal plane, whereas time is read in the vertical dimension. Changing the path or the environment gives a different Minkowski model.
Sources Benedikt, M. L. (1979) To Take Hold of Space: Isovists and Isovist Fields. Environment and Planning B, 6(1) 47-65. pp. 54