In our evening drawing studio, we spent the third week exploring shape and shadows. The flash of the camera cuts out the shadows of the blocks below but you can get an idea from the drawing that it was a complex composition of shapes and shadows.
Another student used blocks, observing the multiple shadows created by several points of light from our overhead track lighting.
Finally the artists discovered that isolating a single object and single light source made it that much easier to carefully observe the light and shadow on different surface planes. In this case the size of the drawing paper seemed to help too. The artist felt much more satisfied with these little drawings done of a single object which allowed for focus and simplification. They make a lovely series as well.