I just found this Hobbit House shed by Owl Swamp Natural Builder.
“This was the second project I worked on. It’s a hybrid earthbag, cordwood, and papercrete roof shed with a reciprocal roof. The plaster over the earthbags is earthen, with a lime stabilizer. All the wood, doors, and windows were salvaged. I paid five bucks for the dome skylight at a thrift store.”