Imagine a regular printer except that the ink is plastic and the printer can print in height, layer by layer.
The main talent for a good 3D print resides in being able to draw precise designs in 3D that the
machine can actually print, mastering the process for consistency and tolerances and developing a post-process to improve the
overall look. The main drawback is that it still takes a very, very long time to print. A full straight monorail track takes almost
6 hours to print!