unless you have a whole wall of HSW, having 2 or 4 paels of HSW on the wall can kind of look random or out of place.
So i cutout pieces from the HSW to add to the corners of your main panels. It will give the impression that your panels are spreading out or growing on your wall. Most importantly it won't just be a square. It's more aesthetically pleasing, like a wall decoration.
The author remixed this model.
Random Cutouts