src_dst 0 0
   fill 0

src_dst 0 2
   fill_noise 5 2 0.7
   src_blend 1
   self_cubes 3 1

src_dst 0 0
   src_blend 0
   cantor_dust 3

src_dst 0 1
   src_blend 1
   self_cubes 3 1
   map_range 0 1 0 0.5

src_dst 2 1
   src_blend 1
   src_range 0.55 1
   fill

   #show_range_sector_type B2 3