T'pol
I loved the blue/green light shining on her face when I was watching the episode, I had to paint it. Painted on a few layers in Photoshop. I kind of like the slightly sketchy look of the skin blending I ended up doing on her face.
Completed digital painting in Photoshop of T'pol.
Progression, when mostly everything was set out, just needed to fill in the hair layers and blend in the skin.
Reference photo from Star Trek Enterprise of Vulcan T'pol. From the episode "The Crossing".