4 hours or so in Photoshop. Based on the default Female Shepard from Mass Effect 3 with N7 armor.
My canon Shepard is an Infiltrator Femshep that I've played since Mass Effect 1! Anyway, I've been meaning to do some more Mass Effect artwork since I did Jack 2 years ago. Who would you like me to do next? I'm thinking maybe Liara... hmm.