: The main difference should be that there is (or ought to be) a help
: page about the hard-coded pattern, whereas the documentation of 
: macro are usually 'scarce'...

  It doesn't have to be.
  If povray 3.5 includes a set of standard macros, I'm sure they will be
documented as any builtin feature.

-- 
char*i="b[7FK@`3NB6>B:b3O6>:B:b3O6><`3:;8:6f733:>::b?7B>:>^B>C73;S1";
main(_,c,m){for(m=32;c=*i++-49;c&m?puts(""):m)for(_=(
c/4)&7;putchar(m),_--?m:(_=(1<<(c&3))-1,(m^=3)&3););}    /*- Warp -*/

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