Shady Stairs

I really enjoy shading with the pen. For some reason the drawings I do using the pen really turn out well for me. One reason I appreciate the pen, is that I enjoy the blending of values that result from the use of the pen. For example, the box below with the shadow coming off of its face really produces a appealing effect. I have always had a great desire to be able to reproduce a transparent effect in my drawing. So, to be able to do so is really enjoyable for me.