I went ahead and fixed the worst hole in the wall. It was almost night by the time I was done, it took significantly more resources than I expected. I melted so much clay for this.
It's not super neat because I did it without any tools, just with fingers, but the wall no longer has a giant hole! It was so bad you could see through the bricks, there was airflow.
I'm thinking of maybe painting sunflowers over it, to hide the clay. Wouldn't that look cool?











