Real Walls in a Pacific Yurt?

[shesupsidedown]

I have seen a few examples in my yurt research of seemingly "real" walls in a pacific yurt.
Like this: https://www.airbnb.com/rooms/900456

Any insight on how this is done? I have been toying with the idea of replacing my Pacific yurt with a Smiling Wood yurt or some other wood yurt structure, mainly because of noise, heat loss, and the lack of real walls.
If I could get walls in there I would be thrilled.

I do live in Oregon so mold might be a problem if you cove the walls?