WIP 2: Plank separation
I knew I’d need some holding edges for each plank, but I didn’t want to add them one by one, so I used a little trick. I added a loop at the bottom. Then I selected all vertical edges and bevelled them with one extra edge inside.

I selected these extra edges and ripped them (with V). This didn’t seem to do much, but when I added the SubSurf modifier and smooth shading, it started to look more like a barrel. (The modifiers are not applied, it’s just that I’m showing the wireframe).
