Simple answer: Dithered or blended colors!
http://www.ldraw.org/article/218.html#colours
http://forums.ldraw.org/showthread.php?t...0#pid13730
w.
http://www.ldraw.org/article/218.html#colours
http://forums.ldraw.org/showthread.php?t...0#pid13730
w.
LEGO ergo sum