#.#.##..#.                                          #...#..#..
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....#.##..                                          .##...#..#
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.#....#.##                                          .#.##...#.
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#..#....#.                                        . #..#.##...
.#..#.....                                    . ,.  .#...###..
..#..#.... gull call.                    .      . , ..#..#.##.
...#..#... ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ...#...###
#...#..#..                                          #...#..#.#
##...#..#. the  seagull is  a  metaphysics trick; a .#...#...#
.##...#..# world-builder's  shortcut,  to  define a ..#...#..#
.###...#.. section of  reality  and imply its size: ...#...#..
.#.##...#. place a  flock of birds at the  edge and #...#...#.
...###...# make  their  calls  tesselate  over  the ##...#...#
#..#.##... entire volume                            ###...#...
.#...###..                                          #.##...#..
..#..#.##. a  seagull can be defined  by  as little ..###...#.
...#...### as  five  vertices;  six  triangles.  (i ..#.##...#
#...#..#.# would recommend  handling  in swarms  of ....###...
.#...#...# at least a dozen birds.)                 ....#.##..
..#...#..#                                          ......###.
...#...#..                                          ......#.##
#...#...#.                                          ........##
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###...#...                                          .#........