%%†=~.....                                          .....~=†%%
¤%%†=~....                                          ....~=†%%¤
#¤%%†=~...                                          ...~=†%%¤#
##¤%%†=~..                                          ..~=†%%¤##
###¤%%†=~.                                          .~=†%%¤###
##¤%%†=~..                                     .    ..~=†%%¤##
#¤%%†=~...                                        . ...~=†%%¤#
¤%%†=~....                                    . ~.  ....~=†%%¤
%%†=~..... 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.)                 ....~=†%%¤
#¤%%†=~...                                          ...~=†%%¤#
##¤%%†=~..                                          ..~=†%%¤##
###¤%%†=~.                                          .~=†%%¤###
##¤%%†=~..                                          ..~=†%%¤##
#¤%%†=~...                                          ...~=†%%¤#