Rmrk2, Rmr,2, Rak2, A2, and Rvo are surface texture parameters in the Rk Parameter family. Like Rk, Rpk, and Rvk, these parameters are derived from the material ratio curve (bearing ratio curve). They let us analyze the valleys of a surface texture independently from the core and peak regions, describing the area of dales (valleys) and the fluid holding volume of a surface texture.
Learn more about surface texture parameters in our Texture Parameter Video library.