Chasm Progress 2: The Mud Report / 169-6935_parab mudworm 7/25/2004 The top only has a layer of burlap on it- no mesh. The burlap was staplegunned to the wooden frame. Using playa dirt brought back by Raven, i created some authentic playa mud to cover a thin layer on the top and bottom. With no beating hot sun, salty snacks, or Gilka, it was rather hard to accurately recreate the playa conditions.