Thanks for the link, you're absolutely right that RGB doesn't work. I modified my original one dimensional sort to make it look like your 2D one, and got this:

Thanks for the link, you're absolutely right that RGB doesn't work. I modified my original one dimensional sort to make it look like your 2D one, and got this: https://www.dropbox.com/s/0pjmjllmqh1x4ap/Screenshot%202014-02-24%2013.41.48.png https://www.dropbox.com/s/0pjmjllmqh1x4ap/Screenshot%202014-... I'm going to experiment with HSL and see if I can get it to work. Thanks again!