The title is like some "ONE WEIRD TRICK ARTISTS DON'T WANT YOU TO KNOW" shit.

This is taught in basic 101 drawing classes, and you can find them cheap on Amazon. One of my professors had one, and he referred to it as "good for architects, training wheels for people who aren't artists."

Judging from the end results, this youtuber clearly falls in the second category.

I can't draw a fucking potato & it's not for lack of trying.

I may have to pick one of these up.