I've just finished the second chapter of my Zbrush tutorial book. This chapter focused on building a head from an underlying skull, adding the main muscle forms and finally adding the skin and details on top. It was a great learning process and I'm relatively happy with my final outcome. Some areas like the eyes and ears are not quite right but I learned all the skills needed from this piece to move on. I will definitely benefit from producing another head in the future. Perhaps using a model for reference.