<p>Porous materials are of interest for various applications due to their unique characteristics. The assessment of the final sample’s properties is equally important. A total of 18 samples cut from a plate were analyzed; they had the shapes of regular prisms with triangular, quadrilateral, pentagonal, hexagonal, nonagonal, and circular cross-sections. 3D plate was made of a metamaterial with a tetrachiral structure. The samples were cut from two different areas of the plate. The tetrachiral structure of the metamaterial enabled the samples to twist under uniaxial loading. The twisting angle ranged from 3.99° to 8.66°, corresponding to 117 % difference. The study recorded variations in transverse strain, with minimum and maximum values of 0.03 and 0.58, respectively. A variation in force reaction was demonstrated, accompanied by a significant and contradictory set of results associated with the shape of the prism cross-sections. The difference between the highest (15.88 kN) and lowest (11.36 kN) force reaction values amounted to 40 %, despite identical cross-sectional areas and porosity of the samples. The highest degree of twisting was observed in the samples with efficient force transmission, indicating a link between internal structural configuration and mechanical behavior under load. Thus, it becomes possible to vary the compression stiffness of a sample without changing its cross-sectional area. The results were obtained via finite element analysis.</p>