  In recent years, personalized fabrication has received considerable attention
because of the widespread use of consumer-level three-dimensional (3D)
printers. However, such 3D printers have drawbacks, such as long production
time and limited output size, which hinder large-scale rapid-prototyping. In
this paper, for the time- and cost-effective fabrication of large-scale
objects, we propose a hybrid 3D fabrication method that combines 3D printing
and the Zometool construction set, which is a compact, sturdy, and reusable
structure for infill fabrication. The proposed method significantly reduces
fabrication cost and time by printing only thin 3D outer shells. In addition,
we design an optimization framework to generate both a Zometool structure and
printed surface partitions by optimizing several criteria, including
printability, material cost, and Zometool structure complexity. Moreover, we
demonstrate the effectiveness of the proposed method by fabricating various
large-scale 3D models.
