Last week I lost the battery charger for my camera and I only had enough juice for a couple of shots at pottery class. I was working alone in a back room with only one window (I like a little privacy when I'm drawing on the clay - it takes such a delicate combination of concentration and luck). I kept the light off and the grey winter light came in low from this one window. I had rolled out big slabs of clay on the slab roller and just loved how rich the texture of canvas looked on the clay (I use canvas to press the clay against). When I took out my handy pin-tool it was like drawing with a nib of light with the beautiful shadows from the low light. Here are the few pictures I took before my camera ran out of battery.
It is interesting. I am left handed but I only draw these pictures of hands on clay with my right hand.