I made a study on portrait, I did a fast sketch directly with oil pastel.
It is really challenging for me to sketch portrait, because a minor mistakes may cause a very obvious difference. Look at the lady with the sunglasses, initially there are no sunglasses. I had made a mistakes on the pupil, therefore I decided to give her a treatment by painting her a sunglasses.
I had this sketch posted on wetcanvas and mention about my cheat on covering the eyes, it does welcomes some comments from the people over there, check it out, I find them interesting.