I wanted to give myself a challenge and decided to try an do some portraiture in a game with only one human character which you play as in first person.
The way I got around it was using the portals as sort of side-on mirrors, which was an interesting exercise for me.
I decided to use Portal Stories: Mel instead of just Portal 2 because I thought the character model would look nicer for Mel than Chell due to time of publishing.