Here’s another concept image; “Eyes”.
Design notes – Basically I was going for minimalistic mood with this one, using a volumetric shader to give it some dark fade. The eyes are simply two UV-spheres lit just enough to penetrate the haze but not overpower the single overhead light. I wanted to convey some sort of creepy story. Maybe there’s a bad-robot (yes, JJ Abrams!) or alien creature hiding in the shadows . . . or someone who is simply playing a horrible practical joke and is about to get taken out with a twitchy-fingered phaser blast from the beholder.