Organic / Hard Surface Study Zbrush
I wanted to do a hard surface study within ZBrush using Polygroups. Trying to stay within ZBrush as much as possible I managed to get most of the study done with the exception of the ears. After a while of trying to get the dome effect I wanted within ZBrush I ended up using a Maya bend deformer to achieve the desired deformation.
With the exception of the ears, everything else was created within ZBrush.
Here is a quick breakdown .gif showing some of the geo splits created.
Cry Engine screenshot with low poly version.