Eyeball by @ragukokarn
No freakin' AI involved.
Nothing special but I kinda like it in its simplicity for once. A good stop gap. Setting Zbrush up for some of that good stuff (ohmygodonlyninemoredaysIcantwait). It now supports redshift in the viewport and I am so going to exploit every single feature of that.
Eyes are probably the single hardest element to pull off "naturally" in any medium. Getting it right is achievement enough. ;)