What are folks using these days to cover the curved surfaces of a set? I've got a semi-circular alcove with a dome on top all framed up, but struggling to find a good material to make the walls and ceiling out of. I've used foam carpet padding in the past, but this room wants to have smoother walls. The nearest 'wiggle' board' supplier is 450 miles away. Found some 1/8" paper board paneling at Home Depot a couple years ago, but it seems to not be stocked anymore. Thanks.