Triply-periodic surfaces 2

2 surfaces, both with the same topology (of Schoen's I-WP triply periodic minimal surface), but with different volume fractions, caused by different warp/weft stiffness ratios. Form-found with periodic boundary conditions, as described here: http://www.grasshopper3d.com/group/kangaroo/forum/topics/periodic-boundary-conditions-with-translationlock-examples