I've been working on capes for the grand kids from a page that I had pinned on Pinterest. The original pinner had posted a drawing of how to cut the cape pattern along the fold. Sounds simple enough. But, do you know what happens when you are drawing an arc which ends at the fold????
after the fabric was cut. So, Doofus had to re-cut the capes to eliminate that inward dip. But they ended up looking OK.