Flat pattern hacking involves creating patterns on paper. Lines and shapes are calculated using formulas, and design elements like seams and pleats are drafted graphically. The result is a finished pattern used to cut fabric.
Draping, on the other hand, is used to create patterns directly on the dress form — without paper or formulas. Instead of a drawing, you work with fabric similar to the main one (e.g., calico for blazers, artificial silk for dresses). The fabric is pinned onto the form, and shapes are created in three dimensions based on design analysis and a structured workflow. Once the shape is achieved, the toile is taken apart, markings are transferred to paper, and only then is the final fabric cut.
Key difference: flat pattern hacking starts on paper and is tested in fabric. Draping starts directly in fabric on the dress form, and only later is transferred to paper.
You can enroll in the draping course (covers everything from basics to advanced techniques), or choose the bundle to master both methods.