I built a half wall to hold books. I am going to add a top to it later when I find the right piece of wood.
At one time there was a wall there that we demo'd. So underneath it the flooring is chopped up. It serves as storage and covers the spot where the original wall used to be.
Here is my hand sketch for the half wall.
It probably took thirty seconds to sketch this out and it would take that long just to open Sketchup.
So most of the time it just simply a lot quicker to sketch on an envelope than it is to bother using Sketchup.