Hi everyone, despite by still busy schedule at the moment, I made some more progress with the game as you can see above.
The above picture is a cataloging of the learning process of drawing boobs. The first two options are much less impressive than the third, which I think is an okay representation of a average sized rack. In the last image to the right I restored the opacity to the skin color and added some shading to them. Since the portraits will usually have clothes on, I drew them as if they were suspended by a bra or swimsuit of some sort, instead of letting them sag more naturally. This makes it look a bit less natural now, but will look better when they are fully clothed I hope.