For Hanzi/Kanji/Hanja, each ideogram could be set with any other ideogram. I have made a custom glyphs order in which ideograms are listed by stroke number and form relativeness. As we can see above, this creates gradient grey shades in lines. However, a real text greyscale is probably like what is on the right — a noise picture.
I hope someone could make a plug-in or write a script to random glyphs order in text view. That will help a lot for Hanzi/Kanji/Hanja design proof.