Christoph Hormann <chr### [at] gmxde> wrote:
: For realistic volumetric clouds you could use media, but that is quite
: slow.  A common method is to use a stack of planes of different height /
: spheres of different radius with partly transparent textures.

  My experiences show that media (method 3) is faster than using stacked
planes.
  Media (method 3) is optimized, so no too many samples are taken. With
a stack of planes povray always have to calculate rays through all the
planes, no matter if the resulting color is inexistent.

  Also media can be looked closely while the planes can't.

-- 
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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