I think the issue with Anasthasius' sample is the bump or displacement.  It's way too high.  Crank it down, and it'd probably look great!

Anyway, here's a frontal close-up for further scrutiny if you feel so inclined.  I'm going to take a hard look at the redness several of you are seeing.  It might be as simple as tweaking the maps.

I don't know how to do scripting, but I may make a pack of MT5 presets that you can plug your own maps into.