As an example of how this differs, with traditional 3d printing you could not print a reasonably large ∩ shape (aka set intersection or cap) without support or

As an example of how this differs, with traditional 3d printing you could not print a reasonably large ∩ shape (aka set intersection or cap) without support or help structures because the beams would fall over before you're done. With the new approach you can as the resulting object is created "in place" as opposed to layer by layer from bottom up.