This was a CAD challenge to make 3D honeycomb infill pattern for SLA printing. I have these cubes with my contact information bossed on the top and use them as 3D printed business cards (at 40% scale).
This will print VERY nicely on a Form2 with the bottom (side with diamond holes) laid flat against the build platform then rotated 60deg around X axis. Disable internal supports!! The let Preform generate default supports
The rotation around X is critical to not have to use internal supports. Preform will complain but TRUST me, it prints just fine. Scale 30-100% to your taste!
It will PROBABLY print fine on FDM as well (not tested), but I recommend sizes 60-100% due to very small internal features TONS of retractions.
Lay flat on "diamond pattern", then rotate 60 deg around X. Disable internal supports. Ignore Preforms warnings regarding minima. It prints just fine! I have printed many by now.