Controling global behavior of a surface by systematic management of local deformations. Characteristics of a surface [global] closely relate to the kind of local distortion applied to it; for example: Higher structural rigidity could be achieved by Aggregation & densification of the surface grid, this operation simultaneously affects the surface porosity. The overall form of the surface could be controlled & adjusted by defining a series of various local deformations and their interrelated patterns. By Reverse-engineering these grid distortions and their patterns, we aim to set a system to allow us predict the global surface behavior & it's relation to various operations. Structural consistence, Formal differentia & surface porosity are set to be the main parameters of the system. This parametric system, once establish, could be utilized to create complex surfaces with transitional characteristics according to programatic demands. Specific conditions could be a result of negotiations between surfaces with different parametric attributes.