My favorite technique for drawing fashion flats or a tech sketch in Illustrator is to use the stacking order of objects in Illustrator. This tutorial will show you how to hide parts of your flat sketch (like the sleeves behind the body) with a few simple tricks.
You will learn:
This is part 1 of a 4 part fashion flat sketching series. You can find the other parts here: Copy Path Segment, Outline w/ Style Lines, & Pathfinder Divide. There’s also a written version if you prefer to read.