====== WALL_CONTOUR_TYPE ======
===== Values =====
  * ''CENTER''
    * Center of the wall
  * ''INNER''
    * Inner contour of the wall. At 1/2 wall width distance of CENTER, in the inside part of the wall.
  * ''OUTER''
    * Outer contour of the wall. At 1/2 wall width distance of CENTER, in the outside part of the wall.