Development of a physically correct model of reflection of the second degree

In this article the development of physically correct light reflectance model which is based on the modified Schlick model is discussed. The advantages and disadvantages of main empirical reflectance models are discussed. The necessity of development of the new physically correct bidirectional reflectance distribution functions is shown. The main steps of normalizing coefficient calculation for the modified Schlick model are discussed. The ideal normalizing coefficient values depending on the surface specularity coefficient  were calculated. The formula of dependence between coefficient value and  was discovered. The absolute error value between  and hemispherical integral reflectivity value was calculated for the interval  n ∈ [2,1000].