SetSectorAdjoins
Enables or Disables rendering through a sector's adjoins. Make the second param 1 to enable the rendering or 0 to disable it. Syntax:
SetSectorAdjoins(sector, boolean);
Disabling the rendering with SetSectorAdjoins() produces the same effect as removing an adjoin-surface's 0x1 Surface Adjoin
flag. However, this verb cannot enable/disable the rendering unless the adjoin has the 0x1 flag.