Managed to get hold of a copy of Zbrush 4 R2, which has Dynamesh, basically when you activate dynamesh it re-skins the mesh creating an even spread of polygons, which fixes the stretching and deformation that you get after a while, this fixed the resolution issue I had last post, and enabled me to smooth out the faceted areas and decrease the level of subdivision at the same time, so the product of todays post is a better looking model with 10x less polygons. (last model was over 5million, this one is down to 500k)
The apparent problem with dynamesh is it's purely for scultping, once you've messed with dynamesh I can imagine you have to wave bye-bye to any future plans of retopologising as you have can't have any subdivision history once you apply dynamesh, which means you can't go back to an older low poly version of your model and fix edge loops, keeping the sculpted detail on top.
They're might be a way round it in the works, or it might already exist and I just haven't found it, but for now I'm happy with what I have.
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