The concept of macro-meso-pore structure tomography based on mercury porosimetry hysteresis loop scanning along the retraction curve (MP-SHL-R) is introduced. The random corrugated pore structure (CPSM) model is used in the simulation of the present loop-scanning variant. The CPSM predicted, distribution (V-T) of trapped mercury, reported elsewhere, is employed in the definition of a retraction line "free of entrapment" (V-R) and hence, a "nominal" MP hysteresis loop scanning (MP-SHL-R(N)) is constructed. The CPSM model have been used in MP-SHL-R(N) scanning cycles applications to deduce the relevant intrinsic pore size distributions, These psds drawn on a 2-D and/or 3-D plots, that constitute the pore structure tomography, are compared graphically to those obtained by MP hysteresis loop scanning along the penetration line (Part I). Further the CPSM model, as applied in Part II, has been successfully used in regression trials of experimental MP hysteresis loop scanning data and generated the respective tomography spectra. it is concluded that given an MP overall penetration - retraction experimental data, the CPSM model can be best fitted over these data and hence achieve sensible predictions of pore structure tomography based on both MP scanning modes.