What is the siding material called that I see on the outside of a number of coops in the coop gallery? Sort of a textured looking plywood stuff? Examples: https://www.backyardchickens.com/coops/roush.html https://www.backyardchickens.com/web/viewblog.php?id=2328 We are in the process of building our coop and don't just want to paint flat plywood. Whatever these coops are sided with looks nice but not knowing what it is called, I am having a hard time searching for it or figuring out how much it costs. Little help?