>>7628517
Like you're never ever gonna use this when drawing a cute girl. I know the guy in the video said "hurr learn fundamentals first!" but I don't think this is it. I made several of the pages into anki cards, so in that sense, I've reread them several times over and I still don't really understand it.
No anime girl will ever require you to know how to mirror a curve on a tilted plane and none of your favorite artists are doing that when they draw your favorite 2D girls.

I got filtered at this specific page when he told me to go to a later page in the book in order to understand a concept he was illustrating here.