This was the sketch from the long pose (about one hour 30mins). It was a bit of a struggle as the model moved her arm and shoulder position quite considerably at half time. Its part of the challenge of life drawing/painting that you are painting a living 3d thing that i not static. I had to totally re-do that section !
I forgot to post the week before's work too! again it was a toughy with a lot of fore-shortening to deal with
Male model prone position
Pastel on Sennelier pastel card
About one and a half hours again