A while back I pondered on the need to use basic geometric shapes to study shading and perspective. Since then I've wavered back and forth. At the moment, I think that nuts will do nicely. With almonds and walnuts in stock, I'm good for now; brazils and hazelnuts to probably follow. Additionally, I'll get really great practice drawing the innards of some cracked open nuts.
I think this is my first drawing making use of cast shadows on a supporting surface. I positioned the nut with the lighting to put together the shading effect I was looking for. I'm feeling the need more and more to set up a dedicated spot, one where I can easily play with lighting.