Gyroid Cube

Available in two sizes, can be shrunk down to 0.8x and should still print successfully. 

The photographs above are printed on a Formlabs Form 2 printer with White V2 resin at 100 microns. No internal supports were added. 

Computational Method (Rhino + Grasshopper + Meshlab)

Modeling method (Rhino + Meshlab)

Helpful links:

Ken Brakke's gyroid surfaces