It was more down to the fractal's effect on the surface really, fractals are quite erratic. I'll post a couple of shots of how different they were...
Here's a scraped one as it came out of the renderer, you can see his nose is broken and the lower half is really noisy. All the faults are from the small-scale fractal scratch shader. You might notice, the scratches are quite symmetrical, too:
[attachthumb=#]
