clay head model

A few days ago I did a clay model of Duncan's head, my base was a Polystyrene oval shape, and I was using modeling clay to cover it. However I don't think I quite got it right though, it looks nothing like Duncan's head. The shape of Duncan's head should be thinner and less round. Because of my failure I'm going to try making his head without the base. Modeling a head around a oval shape is difficult because you have to work larger than you might have expected. You can't squash polystyrene so you have to add more clay surrounding it to change its shape, thus making it more rectangular. The bigger the head gets, the more detail you have to add. The eyes on this model are larger than they should be although they don't have what should surround them: they eye lids and lashes, these would make the eyes look smaller.
The other thing is that you can't tell the difference between the hair and the head on this model and I've forgotten the ears.


Below is the head without the polystyrene. This head was easier to model, it was much smaller but was definetly easier to change it's shape as I went along. However, the smaller you get, the less detail can be added.