Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4527305.

Originally this shape was designed as a lamp shade for a chandelier. It derives from a fractal 2D-shape similar to the Koch-curve (using hexagons instead). The 2D-shape is varied along the extrusion path in rotation, size and fractal-depth.

The file should be printed in spiral or vase mode, where only the outer shell is used. With a thickness of 0.4-0.6 mm there's a good compromise between stiffness and translucency.

The geometry was created using Rhino3D and Grasshopper.