Cube Art

Inspired by this reddit post.

FreeCAD file provided as well if you'd like to see the hard way to model this, or would like to adjust/tweak.

Note: The pictured print used my original sizing where the holes in each face were 3/5 of the overall length. The provided stl has this adjusted to 1/2 the overall length, better matching the original design.

Added an XL version, which was scaled up within FreeCAD, to produce smoother curves when large.