Quote Originally Posted by batwister View Post
If you only look at the torso and thigh, it certainly couldn't be mistaken for solarisation. It's the feet that make the image appear this way. This is because there is charcoal on the soles of her feet from the floor beneath her. I think this is what creates the confusion about the lighting/solarisation.
I think you are quite right. And I think the floor records the dance that has been performed already!