This paper provides information and insight about using three dimensions in teaching patternmaking software. In particular, it addresses the advantages of using 3D garment simulation in advanced patternmaking courses for upper-level fashion design students. The objective of this course project is to teach students use of the patternmaking software program to create a production garment for a number of apparel markets and make patterns by using additional software, which allows 3D garment simulation to analyze the fit to the body while using a dressform and a 3D virtual model avatar.