This is a 3 hour painting of one of my favorite models.   I painted this on a medium gray toned panel.  I began by blocking in the shadows with burnt umber and then built up the lights.  Much of the green tone was created by mixing raw umber with lemon yellow.

This was a very odd palette that I used for this painting.  I had burnt umber, raw umber, lemon yellow, ultramarine blue, terra rosa and white.  I could have really used black or some nice transparent reds but it was a challenge to make due with what was there.