Abstract BRDF continues to be used as a fundamental tool for representing material appearance in computer graphics. In this paper we present a practical adaptive method for acquisition of anisotropic BRDF. based on sparse adaptive measurement of the complete four-dimensional BRDF space by means of one-dimensional slices. which form a sparse four-dimensional structure in the BRDF space. https://pipingrockers.shop/product-category/st-johns-wort/