Double Gyroid - 2 Gyroids intertwined but not connected to each other - both form a shape of a cube. Double Gyroid - Math Art
Stack few Schwartz, intersect with a ball then post process Schwartz! Ball - Math Art edit: design revised - borders emphasized.
If you misses out on the Free to Download - Omicron 100mm - Math Art by Dizingof , this one is the next version. Omicron Plus 100mm - Math Art