This month, I worked with my mentor on illustration in design and getting ones point across through a drawing. we focused on drawing gestural figures as well as detailed full figures so that we show different details. the gestural drawings are less developed versions of the full figured ones, giving you a quick look at the intentions of the designer.
The most common illustration type is the full figure not in motion, however, my mentor prefers to draw a full figure in motion. The in motion version is better, my mentor says, so that you can really see what a garment looks like when its going down the runway.
(above is a detailed full figure illustration containing written details, swatches, and a shoe drawing in the right hand side)
The third type of illustration of a garment is a flat. A flat is an often black and white illustration of the garment you are intending to make as if it were placed flat on a table and you were illustrating it. This should include various details from stitching to shading on the folds. This method is usually used for garments like pants, shirts, jackets and coats.
(to the left is a gestural drawing of a garment to give the general look. To the right is a 'Flat')