Heh, just the standard down scaling issue with the resolution. I wanted to make it game ready as possible so 2 X 2048 diffuse, 2 X 2048 normal maps and 2 X 2048 spec. Which is a little overkill I think. Next time I will aim for 1 2048 or 1 4096 square for a character.
As they were painted at 4096 and reduced it all just got lost. For the final image I probably will leave the 4096 maps. In these renders they are the 2048 ones. Looking at it again, yup the eyes shader needs work.