To maximize the speed-up, we instruct 3D printers to extrude
filament not layer-by-layer, but directly in 3D-space,
allowing them to create the edges of the wireframe model
directly one stroke at a time. This allows us to achieve
speed-ups of up to a factor of 10 compared to traditional
layer-based printing. We demonstrate how to achieve
wireframe previews on standard FDM 3D printers, such as
the PrintrBot or the Kossel mini. Users only need to install
the WirePrint software, making our approach applicable to
many 3D printers already in use today. Finally, wireframe
previews use only a fraction of material required for a regular
print, making it even more affordable to iterate.