So originally I was going to cover a plastic pot with spray foam and then coat with monstermud. A rubber stamp made from real bark was planned to get the perfect bark texture. But when I got ahold of a lot of real oak bark, I just started attaching it with screws. I only sprayed the front side with foam when the plan changed.
The inside lip was still visible, I needed a way to hide it with carve foam or something. The hole in the back is for pumping fog.
A closeup look of a screw. There were lots of gaps where the foam showed thru that I painted black.
Since I had lots of bark left, I added it to the inside to hide the lip. The bark was attached inside out to hide the bark texture and get that dried out woody pulp look.
Smaller pieces of pine bark mulch from the front yard was hot glued into small gaps.